Beyond the Blue Door

I clicked through another batch of emails, deleting sponsorship requests I would never accept: energy drinks that tasted like battery acid, tactical kit that would fall apart on its first proper expedition. Standard fare for a channel my size.

Then I saw the subject line: Private expedition opportunity - GBP 400,000.

Spam, obviously. I nearly deleted it unread, but something stopped me. The message was brief and professional. A Russian businessman called Viktor Sokolov wanted to hire me for a week-long film project in Russia.

The fee was GBP 400,000, with a further GBP 400,000 conditional upon satisfactory completion. There were no details about what I would be filming or where. I read the message twice, then a third time. The money was absurd, more than I would earn in two years of brand deals and video revenue combined.

That sort of money would clear my British mortgage, establish a proper retirement fund and let me choose projects instead of taking whatever paid the monthly housing costs. Too good to be true usually meant precisely that.

I searched for Viktor Sokolov and found almost nothing: a handful of mentions in technology investment articles and a blurred photograph from a conference in Dubai. No social media presence, no Wikipedia page, just someone wealthy enough to remain practically invisible online.

I replied anyway and asked for more information.

I expected nothing back. An answer arrived twenty minutes later. Mr Sokolov would be in Moscow the following week and suggested meeting at the Metropol Hotel to discuss the details in person.

The email included business-class flight arrangements and confirmation that a suite would be reserved in my name. All I had to do was say yes.

I leant back in my chair and stared at the monitor. I had spent ten years building my channel from a home studio in Britain, testing myself against some of the worst conditions on Earth and teaching other people how to survive. Before that, I had served four years as a Royal Signals communications specialist. Everything I did rested on planning, observation and risk assessment.

Nothing about this passed a rational safety check.

Even so, I found myself typing, 'I'll be there.'

The Metropol was everything I was not: polished marble, crystal chandeliers and staff who looked far too elegant to be dealing with me. I arrived in my cleanest jeans and a jumper without holes, feeling conspicuously out of place. The concierge directed me to a private dining room on the second floor.

I knocked twice and entered.

Viktor Sokolov sat alone at a table large enough for twelve. He was in his fifties, with grey at his temples, and wore a suit that probably cost more than my car. He did not rise.

'Mr Mercer,' he said, indicating the chair opposite. 'Thank you for coming.'

I sat. A waiter seemed to materialise beside us, poured water from a crystal jug and vanished again.

'I have watched many of your films,' Sokolov said. His English was immaculate, touched by only the faintest accent. 'Your Scottish Highlands winter survival series was particularly impressive.'

'Thanks. Perhaps you can tell me why I'm here.'

He smiled, but his eyes did not change.

'Direct. Good. I appreciate that quality.' He placed both hands flat on the table. 'My company has developed an advanced prototype survival system. We require someone with your expertise to test it under authentic conditions.'

'What sort of system?'

'Communications, shelter, navigation and environmental support. The entire package weighs less than five kilograms.'

That caught my attention. A complete survival system at that weight would be revolutionary, if it worked.

'Where would the test happen?'

'A remote region of eastern Russia. Uninhabited, with challenging terrain.' He took a sip of water. 'We will transport you, provide the equipment and collect you after seven days.'

'And you're willing to pay GBP 400,000 for that?'

'An immediate payment of GBP 200,000 has already been transferred to your account.'

He slid his mobile across the table. Its banking application showed a completed transaction.

'Consider it a gesture of good faith.'

I checked my own mobile. The money was there. Two hundred thousand pounds, transferred just like that.

'Why me?' I asked, working to keep my voice level. 'There are plenty of survival experts. Former military people with more specialised training.'

'Your ability to communicate. You explain technical concepts clearly to a large audience.' He paused. 'And, yes, your public profile. If our system performs well in your hands, its marketing value will be considerable.'

It did not add up. No company paid this much for equipment testing, even with publicity attached. But the money in my account was real.

'What's the catch, Mr Sokolov?'

'The location must remain confidential. You may take no personal technology or specialist equipment beyond expressly approved basics. You must also accept our editorial approval before publishing anything about the experience.'

Every condition was a warning.

But the money was still there.

'I need to think.'

'Of course.'

He signalled, and another man entered carrying a folder.

'The contract is here for your review. Take until tomorrow morning.' Sokolov stood and extended his hand. 'I hope you will accept, Mr Mercer. This could benefit us both.'

I shook it. His grip was cold and dry, like pressing my hand against stone.

Back in my suite, I read the contract three times. The legal language was dense but straightforward. Its confidentiality clauses were severe, though not implausible for prototype testing, and the payment terms matched what Sokolov had promised.

I paced until midnight. The sensible choice was to walk away. There were too many unknowns and too many restrictions.

Yet the money would change my life. It offered security I had never possessed and the freedom to make the films I wanted rather than those sponsors demanded.

At 01:00, I set my camera on the desk and pressed record.

'My name is Daniel Mercer. It is currently 01:07 on 10 March. I am at the Metropol Hotel in Moscow.'

I explained the offer, described Viktor Sokolov and listed the contract terms.

'If you're watching this, I did not deactivate the scheduled upload. Unless I enter my password within eight days, this recording will be published automatically. If that happens, something has gone wrong.'

I uploaded the file to private cloud storage, scheduled its release and signed the contract.

Morning arrived as grey light filtered through expensive curtains. I packed my few belongings, went downstairs and found Sokolov waiting in the lobby with another man. He was tall, with a soldier's posture and constantly watchful eyes. No introduction was offered at first.

'You have made a wise decision, Mr Mercer,' Sokolov said as he took the signed contract. 'Oleg Morozov will handle our travel arrangements.'

I followed them to a waiting car while the rational part of my mind continued to insist that I was making a mistake. But I had survived blizzards, predators and flash floods. I had endured conditions that had defeated other people.

Whatever Sokolov intended, I trusted my abilities.

As we drove away from the hotel, I realised I had no idea where we were going. It was another risk in what was rapidly becoming the strangest job I had ever accepted.

The steps to Sokolov's private jet caught the early morning light. I climbed them without looking back at Moscow. No cabin attendant greeted me. Oleg Morozov stood inside with his back straight and his gaze fixed on me. He pointed silently towards a leather seat.

I put my small holdall in the overhead compartment and sat. The cabin smelt new, all polished wood and expensive leather. Four seats faced one another around a glossy table, with several individual seats farther back. Sokolov was already opposite me, typing on a laptop.

'Coffee, Mr Mercer?' he asked without looking up.

'Black, please.'

Oleg placed a cup before me, then sat where he could watch both me and the cabin. His eyes never rested. The way he moved confirmed military training.

'How long is the flight?' I asked after several minutes.

'Long enough,' Sokolov replied, still studying his screen. 'I suggest you rest. The testing location will require physical endurance.'

Those were the last words he spoke for hours. The jet flew east while Sokolov worked and Oleg watched.

I alternated between staring through the window at the immense Russian landscape and closing my eyes without quite sleeping. Trust did not come easily, particularly at 30,000 feet with two men I barely knew.

We landed at a strip that scarcely deserved to be called an airfield: a paved runway surrounded by dense pine forest and a single hangar. There was no terminal, no other aircraft and no sign identifying the place. A large 4x4 waited beside the hangar.

Oleg loaded our bags while Sokolov made a brief call. I checked my mobile. No signal. I had expected as much, but the sight still unsettled me.

'Your mobile will not function here,' Sokolov said. 'The system includes communications equipment. Outside technology would compromise the results.'

I put the useless mobile away and climbed into the rear seat. Oleg drove, with Sokolov beside him.

The dashboard clock read 14:17, though I had no idea which time zone we had reached. We drove for hours. Rough roads became gravel, then faded into barely visible tracks beneath an increasingly dense forest. The pines gave way to immense trees whose trunks blocked most of the sky.

The air grew colder as we climbed. Oleg never hesitated at a junction. He had driven this route before, probably many times.

We reached a hunting lodge as darkness fell. Built from dark timber beneath a steep snow roof, it looked sturdy rather than luxurious. Smoke rose from a stone chimney. Someone was already inside.

'Your home for tonight,' Sokolov said as he got out. 'Tomorrow your real work begins.'

The interior matched the lodge's exterior: functional, plain and heavy. Animal heads watched from the walls of a main room furnished in dark wood. A kitchen held basic provisions, and a corridor led towards the bedrooms.

An older man beside the fire nodded to Sokolov, then disappeared through a side door without being introduced. The fire's warmth failed to reach the corners.

'Your room is the second door on the right,' Sokolov said. 'Dinner in one hour. Oleg will brief you afterwards.'

My room contained a narrow bed, a wooden chair and a small lamp on a bedside table. Beyond the window there were only darkness and trees.

I sat and tested the mattress. Firm, almost hard. I had slept on worse.

Dinner was simple but substantial: venison stew and black bread, with no alcohol. Sokolov ate quickly and spoke only to Oleg in rapid Russian. The older man did not join us. When the meal ended, Sokolov left without explanation.

Oleg beckoned me into the main room. A worn rucksack sat on the central table. It was made of faded green canvas and looked a perfectly ordinary size. A faded patch above the main pocket read 'Northward Expeditions'. It resembled something from an army surplus shop, not a revolutionary survival system.

'This is the equipment?'

Oleg nodded. 'Mr Sokolov says you should familiarise yourself with it tonight.'

I opened the main compartment. Empty. I checked every pocket, zip and fold. The only object was in a small internal sleeve: a heavy, coin-sized ceramic-metal hexagon marked with a faint spiral.

'There's nothing here.'

Oleg's face remained blank. 'Mr Sokolov says its properties will reveal themselves during the test.'

I examined the rucksack more closely. Its material felt peculiar, light and dense at once. The seams were too precise for normal manufacture, and there were no labels identifying its origin or composition. Even the zips moved with unnatural smoothness.

'What exactly am I testing?'

'Mr Sokolov will explain in the morning.' Oleg moved towards the door. 'We leave at 04:00. I suggest you sleep.'

Sleep came badly. The mattress was uncomfortable and the lodge unnaturally quiet after Moscow's constant sound. My thoughts kept returning to the empty rucksack.

'GBP 400,000 to test an empty rucksack in the Siberian wilderness,' I muttered.

Nothing made sense.

The knock came at 03:30. The lodge was cold and the fire had collapsed into embers. I dressed in layers: thermal base clothing, a flannel shirt, a heavy wool jumper and a waterproof jacket. These were trusted clothes, expressly approved as basic protection, unlike the mysterious rucksack.

Breakfast was waiting: porridge, dried fruit and strong black coffee. I ate automatically, taking on fuel for whatever lay ahead. Oleg and Sokolov entered as I finished, both dressed for serious field conditions.

'Ready, Mr Mercer?' Sokolov asked.

'As ready as I'll ever be.'

I shouldered the empty rucksack. It felt unnaturally light.

We left in darkness, our head torches cutting narrow paths through the forest. Oleg led at a purposeful pace, Sokolov followed and I brought up the rear. Nobody spoke.

The walking became harder after sunrise. The ground rose and dipped, with rocks breaking through the soil. Oleg repeatedly left the easier routes for no apparent reason.

By mid-morning, I knew we were not travelling directly. We were not circling, exactly, but the route was designed to confuse. Most people might have missed it. Years outdoors and my Signals training made patterns difficult for me to ignore.

They were taking me to a precise location by a route intended to prevent me finding my own way back. It was what you did when you did not want someone returning without a guide.

After six hours we entered a small artificial clearing. Trees had been felled to create a circle roughly ten metres across. The stumps had been removed and the ground levelled, leaving only sparse plants and patches of snow in the shade.

Sokolov checked his watch and faced me.

'This is where you will conduct the test.'

'And what exactly am I testing?'

'Survival, Mr Mercer.' He indicated the rucksack. 'That equipment is designed for extreme conditions. You are the ideal subject to evaluate its effectiveness.'

'It's empty.'

'Is it?' His smile left his eyes untouched. 'Perhaps you have not activated it correctly.'

He produced a compact, military-grade satellite telephone.

'One number is programmed. Use it only in a genuine emergency. Oleg will return in exactly seven days to collect you and your findings.'

'Seven days? Here?' I surveyed the anonymous clearing. 'What's special about this place?'

'Everything you need is in that pack,' Sokolov said, ignoring the question. 'I look forward to seeing your results.'

He nodded to Oleg and they turned away.

'Wait. What about water sources, game trails and basic orientation?'

Sokolov paused but did not look back.

'You are a survival expert, Mr Mercer. That is what I am paying you for.'

They vanished among the trees. Their footsteps diminished until there was only silence.

I stood alone, holding a satellite telephone and wearing an empty rucksack.

Clouds moved across the weak sun and the temperature dropped. The clearing offered no protection from the weather. There was no visible water and no obvious game trail, only trees, undergrowth and silence.

I drew my survival knife, the one personal tool I had insisted upon keeping, and marked a tree at the clearing's edge. Then I walked the perimeter and noted every feature.

The survey confirmed what I had observed during the approach. We had come from the east, doubled north, circled from the west and doubled back again. The confusion had been deliberate. I was exactly where Viktor Sokolov wanted me.

The question was why.

The rucksack rested on a fallen log where I had left it. It looked ordinary and remained empty apart from the hexagonal object.

I lifted the object and turned it between my fingers. Its ceramic-metal body was heavier than its size suggested, and the faint spiral seemed to shift when the light caught it.

GBP 400,000. Whatever game Sokolov was playing, I was already inside it. I needed to learn the rules.

I picked up the rucksack and weighed it in my hands. Empty or not, it was wrong. The material was almost slick beneath my fingers. I had tested hundreds of pieces of survival equipment, but nothing on the market felt like this.

The seams appeared fused rather than stitched. There was no thread, no visible reinforcement and no double stitching where the straps joined the body. Each join was seamless in a way conventional manufacturing could not achieve. The zips moved silently, never catching at the corners.

I had paid good money for premium packs that did not work half as smoothly after three years of use.

I laid the approved essentials on the log: a water bottle, dried venison, a compass and the satellite telephone supplied by Sokolov. My primary mobile was there too. I had been permitted to retain it for filming, although it had no signal. Before leaving Britain, suspicion had also prompted me to conceal a stripped-down backup mobile inside the hollow heel of one boot. Nobody had found it.

I searched every compartment again. The rucksack remained empty except for the heavy, coin-sized ceramic-metal hexagon. There were no switches or seams on it, only the faint spiral.

The sun was sinking quickly. In country like this, darkness followed fast, and the temperature would fall soon afterwards. I needed water, fire and shelter.

The essentials did not change, wherever you were.

I pocketed the hexagon and put on the rucksack. Empty or not, it was better than leaving it behind. Then I gathered wood from the clearing's edge, marking every tree I passed with my knife.

The forest floor was damp, though not saturated. Beneath the thicker trees I found enough dry branches to build a small fire lay and stack a reserve beside it. By the time I finished, shadows covered the clearing and the temperature was dropping sharply. I still needed a windbreak and more substantial shelter.

Then I felt warmth against my thigh.

It came from the hexagon in my pocket, and it was not body heat.

I drew it out. Cold turquoise light pulsed around its edges, following the spiral towards the centre. The glow strengthened as I watched.

'What the hell?'

The hexagon grew warmer in my palm. It was not hot enough to burn, but the temperature continued rising. When my thumb crossed the spiral, turquoise light shot upwards.

I dropped it.

It struck the ground, but the light expanded into a roughly one-metre sphere of cold turquoise radiance, hovering a few centimetres above the forest floor. I stumbled backwards and nearly fell over the log.

This was not ordinary technology. It was not an advanced GPS receiver or emergency beacon.

I pulled out my primary mobile. If an experimental Russian weapon was about to kill me, I intended to leave a record. I began filming the slowly turning sphere.

'Day one at the test location,' I said quietly. 'I was given an apparently empty rucksack containing a concealed device. The device has activated and produced this effect.'

The sphere rotated faster. Its centre cleared as though an unseen hand were wiping condensation from glass. Beyond it stood trees.

They were not the pines and firs surrounding me. Their trunks were immense, covered in ridged bark, and the light among them was purple rather than the blue-grey evening of the clearing.

I moved around the sphere at a cautious distance. The view changed with me, revealing new angles of the same forest. It was not merely unfamiliar. It was wrong. The scale was wrong, the colours were wrong and the plants seemed to move against the wind.

'The device appears to be projecting some kind of window or display showing another location,' I told the camera. 'I don't recognise the forest or any of the vegetation.'

I picked up a stick and approached. The sphere did not react. It hung there as a perfect boundary of light.

I pushed the stick towards it. There was no resistance. The end simply vanished as it crossed the surface and appeared in the other forest. I pulled it back. It emerged intact.

I repeated the test, pushing it farther through before retrieving it. The result was identical.

'It appears to be some kind of portal.'

The word sounded ridiculous. Portals belonged to science fiction, yet so did the thing floating in front of me.

The temperature continued to fall. My breath clouded in the air and stars began to show through breaks in the darkening cloud. It would be below freezing within hours.

My approved supplies were enough for an emergency, not a week of severe cold. The layers would help, but without effective shelter, one truly cold night could kill me.

I had to decide quickly.

I returned the mobile to my pocket but left it recording. Evidence mattered, whatever happened next.

The satellite telephone felt heavy in my other pocket. It contained one programmed number and was intended for emergencies only.

Did a glowing doorway into an impossible forest qualify?

If I called, what would I say? And who would answer - Sokolov, Oleg or someone else?

The wind strengthened, driving dead pine needles across the clearing. My small reserve of firewood would not last until morning, and gathering more in darkness would be dangerous. The turquoise sphere had become the brightest object around me.

The forest beyond looked warmer. It was not necessarily safe, but it did not appear frozen.

My watch showed just after 18:00. Oleg was not due for seven days.

I approached the sphere once more and studied its boundary. The line between here and there was absolute. Light rippled whenever I moved. Perhaps it was random. Perhaps the thing was responding to me.

The hexagon lay where I had dropped it. I picked it up carefully. It was cool and dark again, as though all its energy had passed into the sphere.

I considered my choices. I could remain in the clearing, build the best shelter possible in darkness, ration my supplies and try to survive until Oleg returned. I could call the emergency number and hope someone came, forfeiting the remaining GBP 200,000 due for completing the assignment and perhaps the conditional payment as well.

Or I could step through the portal into an unknown place that might not freeze me immediately.

Every choice carried serious risk.

I secured the satellite telephone, my recording mobile and the dormant hexagon. I tightened the straps of the apparently empty rucksack. Whatever it truly was, it had produced the portal, and I would not leave it behind.

The other forest looked less like Earth with every passing minute. Its shapes were subtly malformed, and its plants moved with the rhythm of breathing.

If I crossed, I might never return. But my wet fire lay had failed, the temperature was already below freezing and I had made my decision.

'I'm not a test subject,' I said for the recording. 'I'm Daniel Mercer. I've survived the Amazon, the Arctic, the Australian outback and winters in the Scottish Highlands. I'll survive whatever is on the other side of this as well.'

I drew a breath and stepped into the turquoise light.

The world twisted around me. Colours ran together, my stomach lurched and pressure stabbed through my ears.

Then it stopped.

I stood in the impossible forest, surrounded by enormous trees whose bark gave off a faint inner glow. The air was thick and humid, carrying the scent of plants that had never grown on Earth.

Behind me, the sphere flickered once and collapsed. The dormant hexagon had travelled with me, but the portal was gone, taking my route home with it.

Every breath required effort. The air seemed to resist my lungs, like high altitude rendered hot and wet. I took several cautious steps. My boots sank into spongy soil.

My mobile was still recording. I switched on its torch and swept the beam around me.

'The portal is gone,' I said. 'I'm somewhere else.'

The phrase was hopelessly inadequate.

The trees rose beyond the reach of my light. Their trunks were wider than cars, patterned with bluish veins that flickered beneath the bark. It was not reflected light. Something alive seemed to be moving underneath.

I tilted the camera towards the canopy. Between immense leaves I glimpsed the darkening sky, then stopped.

Two moons hung above the forest. The larger was pale yellow; the smaller had a bluish cast. Both showed through gaps in the branches.

'Not in Russia any more,' I whispered.

This was no undiscovered Siberian forest. It was not Earth.

My mind offered explanations in quick succession: hallucination, a constructed environment, drugs. Two moons disposed of each one.

I forced myself back to practicalities. Survival came first. Existential panic could wait.

Water, shelter and security. The priorities remained the same on any world.

The temperature was mild, like early autumn in Britain, and the humidity was tolerable. Low plants gave off enough light for me to switch off the mobile's torch and preserve its battery.

I crouched and rubbed some of the soil between my fingers. It crumbled like peat, then slowly drew itself together again. It was almost as if the ground were alive.

Nothing around me was familiar. Spiral ferns coiled towards my warmth. Vines expanded and contracted as though breathing.

Something moved in the undergrowth to my left.

I froze.

It was not small. More vegetation rustled, closer now. There were several of them.

I backed towards the largest tree and pressed myself against its glowing bark. No sudden movement, no unnecessary noise. I kept my breathing steady and watched the darkness.

Three creatures emerged between the trees roughly thirty metres away. They moved with a wolf's coordination, but their bodies were too long and their four legs bent at unnatural angles. Each elongated skull carried branching antlers that seemed to consume light rather than reflect it. They travelled as a group, scenting the ground and communicating with soft clicks.

Antler-hounds, I thought. It was as good a name as any.

I held my breath as the leading creature raised its head and widened its nostrils. It looked directly towards me. Its eyes caught the tree glow like black mirrors.

For five seconds, nothing moved.

Then it turned and continued into the forest. The others followed, their four bent legs carrying them soundlessly away.

I waited five full minutes, counting each second. Only when I was certain they had gone did I leave the tree, keeping low.

Remaining on the ground was a poor plan. I needed height, both for a view and for protection. The nearest climbable tree stood about fifteen metres away. It was smaller than the giants and had low branches spiralling around its trunk.

I crossed carefully, placing each foot in silence. The bark was rough without being sharp. I pulled myself onto the lowest branch and began climbing. Years of fieldwork made the movement familiar.

At roughly six metres, I found a junction broad enough to support me. I settled into it with my back against the trunk and my legs along a branch.

The empty rucksack pressed awkwardly behind me. I removed it, intending to use it as a pillow while I considered my next move. As I adjusted the straps, my fingertips found something like a seam where no seam should have existed, not inside or outside but between layers of the material.

I pressed along it, searching for a fastening.

Something clicked.

The rucksack trembled in my hands. I nearly dropped it as the material flowed into a new shape. Pockets formed across its surface. The straps retracted, then emerged thicker and padded.

'What the hell?'

When the change ended, the empty shell weighed several kilograms and contained objects I could not name. One compartment held gleaming purification compounds. Another contained small marked inserts with coloured bands. Compact savoury ration blocks and electrolyte gel sachets filled a sealed pocket that had not existed before.

From a new side compartment I removed a wrist device. Its band was made from the same strange material as the rucksack, with a flat metallic surface where a watch face should have been.

There were no visible controls. I slipped it over my left hand.

The band tightened to a perfect fit. Its face illuminated and projected a holographic display about fifteen centimetres above my wrist. Unreadable symbols streamed past, then resolved into simple icons: a water droplet, a thermometer, a compass and several others I did not understand.

I touched the droplet. A map appeared, displaying blue points at varying distances from a central marker.

'Water sources,' I said. 'It's showing me water.'

The thermometer icon produced more data: ambient temperature 18.3 degrees Celsius, body temperature 37.1 degrees Celsius and atmospheric oxygen 18.6 per cent.

That explained my laboured breathing. The oxygen concentration was lower than Earth's normal level, although still sufficient to keep me conscious.

Another icon resembled a shield. I touched it and the device emitted a soft tone. A transparent field expanded around me to a radius of roughly one metre. Its boundary shimmered faintly but was otherwise almost invisible.

A twig snapped below.

One of the antler-hounds stood directly beneath my tree, its long neck raised as it searched the branches. It appeared to be staring straight at me.

I remained utterly still, scarcely breathing.

After several moments, the creature looked away in confusion. It paced around the trunk, scenting the ground, then wandered back into the forest.

The field had concealed me. It had masked not only my appearance but my scent.

I examined the rucksack again with a new understanding. This was not a conventional survival kit. Every component had been selected or created specifically for this environment. The purification materials, the rations, the atmospheric readings and the field generator were calibrated for this world, not Earth.

The truth settled over me.

I was not testing the equipment. I was the test subject.

Viktor Sokolov had sent me through to discover whether a human being could survive here.

And I doubted I was the first. The antler-hounds had reacted as though human scent meant something to them. They had hunted people before.

I leant against the trunk while the concealment field remained active. The twin moons had fully risen, illuminating more of the forest: giant glowing trees, strange formations in the distance and the shapes of other creatures moving among them.

I was trapped on an alien world with experimental technology and my own skills between me and death. Somewhere in this place, there had to be a way home.

Three days later, I squeezed into a narrow opening between two rock faces and scraped my shoulder against the stone.

The concealment field had lasted just long enough to lose the pack that had tracked me since dawn. Its power indicator now flashed red, useless until it recharged.

Three days of constant movement had taken their toll. My legs ached from climbing fallen trunks and wading through ankle-deep pools of glowing water. Sleep came in twenty-minute stretches while I wedged myself among branches high above the forest floor. I lived on the compact savoury ration blocks and electrolyte gels produced when the adaptive rucksack configured itself for the alien environment. The blocks were bland but sustaining.

The passage widened as I moved deeper. My mobile's torch revealed a true cave system rather than a simple fracture in the rocks. The air was cooler and easier to breathe than the thick humidity outside.

'Day three,' I murmured to the recording. 'I've found what may be defensible shelter. The first real break since I arrived.'

I swept the beam over the ground, searching for signs of the creatures I still called antler-hounds. The stone floor was bare except for a thin coating of dust.

The passage narrowed once more, then opened into a larger chamber. My light could not reach every wall, and the ceiling rose well beyond me. Water dripped somewhere in the darkness.

I advanced carefully, testing every step. A broken ankle would be fatal with my limited resources.

The torch caught a metallic reflection about ten metres ahead.

It was manufactured. Nothing natural in this world had that finish.

I moved closer, checking the darkness around me. A small pile of equipment lay on the cave floor: a torn bag, several metal containers and instruments that resembled scientific field tools.

Then the beam found the body.

A man sat against the cave wall with his chin resting on his chest. He wore the remains of expedition clothing: heavy trousers, boots and a ruined jacket. Most of the flesh had vanished, leaving bones connected by strips of desiccated skin.

'Jesus,' I whispered, and stepped back.

Death was not new to me. I had seen bodies after mountain rescues went wrong and wilderness accidents turned fatal. Once, I had helped recover a drowning victim. But this was different. This was a human being who had died alone in a place no human was ever meant to be.

I forced myself closer, covering my nose against the stale, musty smell of decay. The body was not fresh. It had been there for weeks at least, perhaps longer. The cool, dry cave air had preserved it to some degree, but nature had still done its work.

A patch on what remained of the jacket sleeve caught my attention. I leant nearer and directed my torch at it. The circular emblem bore Cyrillic lettering around what looked like a stylised atom or molecule.

Some sort of Russian research institute.

'Who were you?' I asked the corpse, as though it might answer.

I swept the torch beam over the scattered equipment. There were research instruments I could not identify, empty water containers and a cracked tablet with a dead screen. Partly trapped beneath the body was a metal case about the size of a hardback book. Unlike everything else, it remained in good condition: a robust waterproof container secured by two latches.

I set my mobile on the ground with its light pointing upwards, then carefully reached for the case. It slid free without much resistance, although the body shifted slightly as I pulled. The latches opened with two sharp clicks. Inside, protected from the damp and dirt, lay a thick journal with a synthetic cover and several folded sheets covered in handwritten notes and diagrams.

Everything was in Russian.

I lifted the journal carefully. Its pages were packed with dense Cyrillic handwriting and technical drawings. One page unmistakably depicted the turquoise portal sphere, surrounded by measurements and annotations. Another appeared to show coordinates or triangulation points.

I could not read any of it.

'Damn it,' I muttered.

Something beside the place where the case had lain caught my eye. It was a wrist device similar to mine, but more complex. Mine had a single display panel; this one incorporated several components into the band itself. I picked it up and turned it over in my hands.

It was dead, like everything else, but clearly built from the same technology as my equipment. Acting on instinct, I pressed it against the device on my own wrist. Their contact points aligned. To my surprise, both units emitted a faint glow.

The battery indicator on my device rose from red to yellow. Power was transferring between them. I waited for the process to finish, then examined the recovered unit. It was considerably more advanced than mine, with additional indicators and unfamiliar icons across its display.

One icon resembled a document marked with lines of text. I touched it. A holographic interface appeared above my wrist, displaying what seemed to be a translation programme.

I held one of the journal pages beneath it. The device scanned the writing, processed it and replaced the Russian text with English.

Day 17.

The atmospheric composition matches the initial readings. Oxygen remains at approximately 18.6 per cent, low enough to make sustained exertion noticeably harder. The water sources tested contain minerals unknown on Earth. Limited consumption appears safe.

Scientific observations. Detailed notes about this world.

I moved through the journal, translating selected passages.

Day 21.

Third encounter with the four-legged predators. The Kharven hunt primarily by scent. Their daylight vision is poor, but in darkness they see better than humans. The branching structures on their heads absorb ambient bioluminescence, probably serving as camouflage.

So the creatures I had been calling antler-hounds had a name. The Kharven.

I returned to the first page to identify the writer.

Research journal of Dr Sergei Volkov. Project Waygate. Entry one.

Transit succeeded. Displacement lasted approximately 3.2 seconds, shorter than predicted by controlled tests. No immediate physical damage beyond vertigo and nausea. The return portal failed to appear at the scheduled time. Following the contingency plan and establishing camp while awaiting extraction.

I looked at the dead man. Dr Sergei Volkov had not arrived here by accident. He had entered deliberately as part of Project Waygate.

I continued scanning.

Day 24.

Still no contact from base. The emergency beacon shows no evidence that transmissions are reaching Earth. I increasingly suspect that the dimensional barrier blocks conventional communication signals.

Several pages later, the tone had changed.

Day 30.

Water supply nearly exhausted. Moving north-east towards the larger river system observed during the preliminary aerial surveys. Kharven packs are appearing more frequently and approaching with greater confidence. Their behaviour suggests they now recognise humans as prey.

The later entries became shorter and more urgent.

Day 42.

My fifteenth day sheltering in this cave system. The wound in my leg appears infected despite antiseptic treatment. The Kharven remain outside. They patrol, withdraw and return. They remember. They wait.

Day 43.

Viktor Sokolov has much to answer for. Seventeen people sent through. Fifteen confirmed dead before this expedition. Irina is missing and must now be presumed dead. I am the seventeenth subject.

She worked beside me. He told her the same lies he told the others. Calibration work. Equipment testing. Extraction after a fixed period. The promised periods varied from subject to subject, but none of them were genuine.

I froze at the name.

Viktor Sokolov. The man who had hired me. The man who had sent me here with a promise that Oleg Morozov would collect me after seven days.

I searched the next pages more desperately.

Day 44.

Translation and geometric modelling programmes complete. Three potential return points confirmed within a radius of 50 kilometres. Dimensional thinning occurs at specific geometrically aligned locations.

The closest point corresponds with coordinates predicted in Pavel's theoretical models.

Pages of calculations followed, along with rough maps drawn from memory. Most were beyond me, but one diagram was clear: a formation shaped like a stone hand reaching towards the sky. Above its raised central finger, Sergei had drawn a portal sphere.

The final entry was dated Day 47. The handwriting shook across the page.

Fever worsening. No strength left to attempt the north-east route to the hand formation. Minimum distance 20 kilometres from this cave.

The Kharven alpha has remained nearby for two days. It is the largest specimen observed and an exceptional six-legged variant. The ordinary Kharven have four bent legs. The alpha's anatomy is unique. It knows I am here. The others brought it something carrying my scent. Their hunting intelligence is greater than I understood.

If this journal is found, travel north-east. Find the stone hand. Alignment occurs during the third phase of the larger moon.

The activator must be placed at the correct elevation. Previous attempts failed because activation was attempted at ground level. The doorway opens above.

Fifteen confirmed dead. Irina missing and presumed dead. I am the seventeenth.

Let one person return and tell the truth.

That was the last entry.

Sergei had died alone, knowing how he might have returned but lacking the strength to reach the gateway. I sat back on my heels and let the journal close in my lap.

Seventeen human beings had been sent through for experimental purposes. Fifteen had been confirmed dead, Irina was missing and presumed dead, and Sergei had become the seventeenth victim. I was the eighteenth person Sokolov had sacrificed to Project Waygate.

Perhaps I could also become its first known returnee.

I gathered everything useful from Sergei's supplies: the advanced wrist device, a compact toolkit, several unfamiliar signal flares and a water purification unit better than the tablets in my rucksack. As I worked, the truth settled heavily inside me. This had never been a survival trial. It was human experimentation, and Sokolov had never expected me to come back.

He had expected me to die here like all the others.

I placed the journal and salvaged equipment in my rucksack. I owed it to Sergei, Irina and every person before them to expose what Viktor Sokolov had done.

I directed my torch towards the rear of the cave. I needed proper sleep before attempting a 20-kilometre trek through territory full of Kharven. The cave would shelter me for the night.

Before moving deeper inside, I looked back at Sergei's remains. I could not bury him there.

The only thing I could do for him was survive.

Reach the stone hand. Find the gateway home. Make Viktor Sokolov answer for seventeen lives.

Twenty kilometres north-east. A rock formation like an upraised hand. For the first time since entering that world, I had both a destination and a possible route home.

I splashed through another shallow blue stream, counting my steps to keep my thoughts ordered. Five days of near-constant movement had reduced me to exhaustion. My boots squelched, saturated after too many crossings through glowing water. The adaptive rucksack had kept me alive, producing compact savoury ration blocks and electrolyte gel sachets when it configured itself for this environment, but only just. My bottle was empty again.

Dehydration was not an option with so much ground left to cover. I crouched at the stream and raised the scanner on the advanced wrist device.

'Let's see whether you kill me,' I murmured.

The display flashed yellow rather than green. Holographic text appeared.

Potable: Yes.

Toxicity: Low.

Mineral content: High.

Warning: Neurological effects possible after extended consumption.

I filled the bottle and took a cautious sip. The water tasted metallic, like it had passed through an ancient pipe. Unpleasant, but preferable to thirst. Four small mouthfuls would have to carry me to the next safer source.

I capped the bottle and stood, my knees protesting. The cloaking field flickered around me for a moment. Its battery was failing again.

The terrain grew steeper as I followed Sergei's coordinates north-east. The enormous luminous trees thinned, opening views of hills carpeted in fern-like growths. The fronds curled away whenever I passed. I still found it disturbing that the vegetation reacted as though frightened of me.

By midday I had climbed high enough to see across the canopy.

There it was, perhaps 16 kilometres away, rising above the trees: a stone formation shaped exactly like a hand reaching towards the sky.

'The hand,' I whispered.

Sergei's notes were right.

I drank again. The alien minerals left a strange tingling across my tongue, but I had to keep moving.

The growl came from behind me, so low and powerful that I felt it before I properly heard it.

I turned slowly.

The creature stood at the tree line. It was at least twice the size of any ordinary Kharven I had encountered. Its long body rested on six jointed legs, each ending in claws that sank into the soil. Its antlers divided into cruel spikes above a pair of black eyes fixed directly upon me.

The Kharven alpha.

My cloaking field was active. It should not have been able to see me.

The alpha lowered its head and drew in the air through flaring nostrils. Then it stepped towards me.

It could smell me through the cloak.

I backed away without taking my eyes from it. The alpha followed at an unhurried pace. It was not charging. It was hunting, confident that its prey had nowhere to go.

When it came within 20 metres, I turned and ran.

The forest blurred around me as I sprinted downhill, hurdling fallen trunks and ducking beneath branches. Behind me, the alpha smashed through the undergrowth with impossible speed. Every second brought it closer.

My boot caught a root. I pitched forwards and tumbled down a steep slope, covering my head until my body slammed against a tree. Pain tore through my ribs. I lay stunned for a moment, struggling to breathe.

The alpha appeared at the top of the slope, its vast body a black shape beneath the alien sky. It scraped the earth once, then began descending. It no longer hurried. It moved as though it knew the fall had finished me.

My wrist device gave a soft warning tone. The display turned red.

The cloaking field died.

I tore open the rucksack and found the disc-shaped sound generators the pack had produced during an earlier adaptation. I activated one and threw it far to my left. It bounced, then emitted a piercing frequency at the edge of my hearing.

The alpha stopped and turned towards it.

I activated a second generator, threw it in the opposite direction and slipped behind the tree while the beast swung its antlered head between the competing sounds.

Five seconds. That was all I had.

I ran into the densest vegetation and relied on everything experience had taught me. Move against the wind. Step on stone wherever possible. Break the line of sight. Do not waste energy looking back.

The alpha realised I was escaping and roared. The sound was like metal being torn apart.

Through gaps between the trees, I could see the hand growing larger.

The following hours merged into one continuous flight. I used the remaining sound generators sparingly, each buying only a little distance. The alpha never stopped. Sometimes I moved far enough ahead to lose sight of it, but it always recovered my scent and resumed the pursuit.

As darkness approached, the sky deepened from purple to indigo. The base of the formation rose directly ahead. Stone fingers thrust from the ground like the remnants of a shattered statue. Each stood more than 30 metres high, with sheer sides and few visible holds.

Sergei's journal had been explicit. The doorway opened above, not at ground level.

I had to climb.

The alpha's howl sounded behind me. It was minutes away.

I circled the formation, looking for the least impossible route. One outer finger had more ridges and ledges than the others. I tightened the rucksack straps and began climbing.

I was never a specialist climber, but years of wilderness work had taught me the essentials. Test every hold. Drive with the legs rather than hauling with the arms. Maintain three points of contact.

The stone was unnaturally smooth beneath my hands, making the climb worse than it had appeared from below. At 15 metres my arms were burning. My damaged ribs stabbed with each reach. I stopped on a narrow ledge and pressed my back to the rock, trying to recover my breath.

The alpha emerged from the forest beneath me. It paced around the base and looked up with those depthless black eyes.

Then it placed a clawed foot against the stone and began climbing.

I had not known it could do that.

Its six limbs found purchase where there seemed to be none, its body flexing in a hideous rhythm as it ascended the vertical face.

I forced myself upwards, ignoring the pain in my ribs and the trembling in my arms. The ledges narrowed until there were only shallow irregularities barely broad enough for my toes.

At roughly 25 metres, I dragged myself onto the summit platform. It was flat and about the size of a small dining table. Wind tore across it as I rolled away from the edge.

There was nothing there. No portal. No visible control. Only smooth stone beneath a darkening sky.

The alpha was 18 metres below and climbing steadily.

I searched the platform with both hands.

Sergei had written that alignment occurred during the third phase of the larger moon. I looked up. Both moons were visible, and the larger one had reached the phase shown in his drawings. This was the moment.

My hand brushed the pocket containing the activator that had opened the first portal. I removed it: the heavy, coin-sized ceramic-metal hexagon, marked by a faint spiral pattern. It had become cold and dormant after carrying me through the original gateway, but now its surface caught the moonlight.

The alpha was 12 metres below. Its claws scraped steadily over the stone.

I pressed the hexagon against the platform.

Nothing.

'Come on,' I muttered, moving it from place to place. 'Where is the bloody door?'

The alpha climbed within 10 metres. The points of its antlers began to appear beyond the rim.

I raised the activator to the moonlight. Its spiral was not perfectly centred. The curves shifted slightly, forming a pattern almost like a fingerprint.

I searched the stone again and noticed a shallow depression near the middle of the platform. A matching spiral had been worn into its surface.

I forced the ceramic-metal hexagon into the socket.

It warmed beneath my palm.

Cold turquoise light leaked between my fingers and spread in ripples across the stone. Three metres above the platform, the light gathered into a roughly one-metre sphere. Its centre cleared, becoming a view into another place.

A snow-covered ridge beneath a grey sky.

Russia.

The alpha's claws hooked over the edge of the platform. Its massive head followed, and its black eyes locked on mine as it hauled itself up the final distance.

I did not hesitate.

I dived into the portal.

The world twisted around me. For a heartbeat I existed nowhere, suspended in a void of spiralling blue energy. Then gravity returned and I crashed face-first into knee-deep snow.

The cold hit with shocking force after days in the damp heat of the alien forest. I rolled on to my back, gasping as freezing air entered my lungs.

Above me, the turquoise sphere flickered once and vanished. The Kharven alpha vanished with it.

I lay in the snow, every muscle shaking with exhaustion, and stared at the plain grey sky. When I tried to rise, a deep cut in my forearm opened and blood ran towards my wrist. My ribs screamed with every breath. My whole body tingled as though I had received an electrical shock.

Six days in the alien jungle had left me dangerously unprepared for a Siberian winter. But I was not Kharven food. I was not dead.

With trembling fingers, I took out the satellite telephone Sokolov's people had approved as part of my basic emergency equipment. The screen glowed in the gathering dusk, but I did not call. Sokolov would be monitoring it.

Six days had passed since I entered the first portal. Oleg Morozov was due to collect me at dawn on day seven. The return ridge lay roughly five kilometres east of the original clearing.

Using a pine for support, I forced myself upright. The surrounding contours matched the terrain I had studied before the drop-off. West would take me back.

I removed my primary mobile, another of the expressly approved basics, and began recording. Its battery stood at 12 per cent.

'Day six,' I said. 'Daniel Mercer. I returned through a portal from another world. Viktor Sokolov sent me, and at least seventeen people were sent before me. Fifteen are confirmed dead. Irina is missing and presumed dead. Dr Sergei Volkov was the seventeenth subject. I am the eighteenth person sent through and, as far as I know, the first to return.'

I panned the camera over the snowy ridge, then turned it towards myself to record my torn clothing, bleeding arm and battered face.

'I found Dr Volkov's remains. His journal documents Project Waygate. This was not product testing. It was human experimentation.'

Before the battery failed, I connected the primary mobile to the tiny backup handset concealed in the hollow heel of my boot. I had hidden it there before leaving Britain, after Sokolov's secrecy made me uneasy. During the flight and drive east, I had used the wired offline link to copy every recording automatically. Sokolov's searches had missed it because the heel looked solid from the outside.

The final alien footage transferred to the backup. I disconnected both devices and restored the heel.

Walking hurt worse than I expected. Snow reached my knees in places, and my legs threatened to buckle after days spent fleeing predators under unfamiliar gravity. I used the survival knife I had insisted on retaining to cut small course marks into selected trees.

Night fell quickly and the temperature plunged. Without proper winter clothing, I would freeze before reaching the clearing. A fallen pine offered a natural windbreak. I cleared the loose snow beneath it and used branches to form a crude roof. It was poor shelter, but better than lying exposed.

Sleep came in fragments. Every snapping branch pulled me awake, my mind still waiting for a Kharven howl.

At first light I continued west. My bruised ribs, deep forearm cut, dehydration and cold exposure slowed every step, though Earth's air and gravity gradually felt normal again. By mid-morning I recognised the lightning-struck tree and the outcrop shaped like a tortoise.

I reached the original clearing shortly before noon on day seven.

Nothing had changed. The same ring of trees surrounded the same fallen log where I had first examined the empty rucksack. There was no sign that anyone had visited since my departure.

The adaptive rucksack had reverted to its plain, apparently empty form after I crossed back. The advanced wrist device still functioned, although most of its alien environmental features had gone dark.

'I need to hide this,' I told the primary mobile's camera, holding up Sergei's journal. 'If Sokolov's people find it, the evidence will disappear. I probably will as well.'

At the edge of the clearing, I found an old pine with a hollow roughly a metre and a half above the ground. I placed Sergei's original journal, the advanced wrist device and the dormant ceramic-metal activator deep inside. Then I used my knife to cut a small X into the bark, disguising it among natural damage.

The primary mobile still held the original recordings, while duplicated files and translated journal extracts were secured on the backup in my boot heel. I retained the ordinary wrist unit and the empty-looking rucksack to avoid making their absence conspicuous.

My mobile battery died around sunset. I sat on the fallen log through the deepening cold, trying to stay awake, but exhaustion eventually dragged me under.

The crunch of boots in snow woke me.

Dawn had barely begun. Oleg Morozov stood at the edge of the clearing with a rifle across his chest. Two armed men waited beside him, their breath clouding in the cold.

'He's here,' one of them called in accented English.

Shock broke through Oleg's usual blank expression. His eyes widened, and he exchanged a quick look with the others. They had expected a corpse, if they had expected to find anything at all.

I remained slumped on the log, my face vacant. It would help if they believed I was broken.

'You survived,' Oleg said once he had recovered himself.

I gave a weak nod.

'The pack.'

He gestured, and I surrendered the rucksack without protest. He searched every compartment. To him it looked ordinary and empty. Whatever alien mechanisms it contained had shut down or hidden themselves.

'Can you walk?'

'Think so,' I rasped.

Two men helped me stand, although their free hands remained close to their weapons. They had orders to bring me back alive, but none of them trusted what had returned.

We followed a path through the forest that I had not noticed during my arrival. After an hour we reached an unmade road where the same large 4x4 waited. The bottle, dried venison, compass, primary mobile and satellite telephone Sokolov had supplied or expressly approved were confiscated before I entered it. The men searched my clothes and boots, but only pressed around the heels. The concealed backup mobile remained undiscovered.

The drive was silent. I leant against the window and pretended to drift in and out of consciousness while memorising every turn and landmark. We travelled out of the wilderness, eventually transferring to an aircraft and then another guarded vehicle. No one asked what had happened.

The men spoke quietly in Russian. I heard Sokolov's name several times and one word that sounded like 'impossible'.

After the long journey west, we arrived at a gated estate in the Pskov region. Stone walls enclosed a large house built from dark masonry and timber.

A woman in medical scrubs met us at the entrance. She led me to a private consulting room equipped to a standard I would have expected from an exclusive clinic.

'Your injuries,' she said in heavily accented English, indicating the examination couch.

I sat. There was no need to feign pain while she cleaned and dressed the deep cut in my forearm, assessed my ribs as probably cracked and treated me for dehydration and cold exposure. She gave me painkillers, water and clean clothes, then left me alone.

Two cameras watched the room. One occupied a ceiling corner; another was concealed in a light fitting, but not well enough to fool anyone who knew surveillance equipment.

I changed without acknowledging them.

Twenty minutes later, Viktor Sokolov entered alone and closed the door. He wore an expensive grey suit that matched his silver hair. His face revealed nothing as he examined me, but his eyes carried an intensity absent from our meeting at the Metropol Hotel.

'Remarkable,' he said. 'No one has ever returned.'

I remained silent.

He placed a sleek metal case on the examination couch and opened it. Inside were neatly banded stacks of cash.

The GBP 200,000 initial payment had already reached my British account before departure. The case held the remaining GBP 200,000 I had earned by surviving, plus a further GBP 400,000.

'You have earned the balance,' Sokolov said. 'I am prepared to add another GBP 400,000 in exchange for your discretion.'

He touched the case.

I looked at the money and then at him.

'Seventeen others.'

His expression tightened by the smallest degree.

'You found Dr Volkov's remains,' he said. It was not a question.

'And his journal.'

It was a deliberate bluff. The journal was hidden in the forest, but I wanted him to believe I might still have access to it or copies beyond his reach.

Sokolov's posture stiffened.

'Scientific progress requires sacrifice,' he replied. 'You have proved that the technology works. The portal can be crossed in both directions.'

'Human experimentation,' I said. 'Seventeen people.'

'Seventeen pioneers. Their contributions will be remembered when we reshape humanity's future.'

'By stripping resources from another world?'

A thin smile appeared.

'By extending our reach beyond the limits of a dying planet.'

He gestured towards the case.

'The offer stands. A further GBP 400,000. A life-changing amount for six days of discomfort.'

I looked down at the money. Combined with the initial transfer and my earned balance, it would clear my British mortgage, secure my future and free my survival channel from sponsors and viewing figures.

'And if I refuse?'

Sokolov's smile never reached his eyes.

'Then we would have a problem requiring immediate attention.'

I stared at the cash. Half was mine under the original agreement. Half was the price of silence.

'I'll take what I earned.'

I removed the proposed GBP 400,000 bribe and left it on the examination couch, then closed the case around my GBP 200,000 balance. The earlier GBP 200,000 remained safely in my account.

'I need to think about the rest.'

His eyebrows twitched, the only visible crack in his composure.

'Of course. Consider it carefully. We will discuss the details over dinner.'

A rigid-backed member of staff escorted me through the house. Paintings lined the walls, any one of them probably worth more than my car. The guest room was larger than the home studio from which I ran my channel. It contained a broad bed, a sitting area and a bathroom with heated flooring.

The door clicked shut behind me.

I kept still and let my eyes work. A camera occupied the corner without any attempt at concealment. Another sat among the books. Beneath the bedside table was a listening device barely visible unless you knew what to seek.

Four years as a Royal Signals communications specialist had taught me what surveillance equipment looked like and how to deal with it.

I placed the cash case on the bed and checked my borrowed clothes for trackers. Nothing obvious.

In the bathroom, I turned the shower hot and allowed steam and noise to build. The listening device beneath the bedside table came free cleanly. I crushed it under my boot heel, then did the same to a second one behind the mirror. I left the cameras untouched. Disabling them would show Sokolov how alert I really was.

My ordinary wrist device showed nearly 17:00. From the staff movements below, I judged dinner would be at 19:00. Two hours.

The guard at the end of the corridor nodded when I approached.

'Computer?' I asked. 'I need to check my channel.'

He pointed downstairs.

'Library. Ground floor. East wing.'

The library tried too hard: untouched leather-bound books, heavy curtains and an ornate desk holding a laptop worth a month's mortgage payment.

Two cameras watched from opposite corners. Good. They could see me behaving predictably.

My channel loaded quickly over the estate's fast connection. I made a performance of checking viewing statistics and comments. Shielded by the desk, I opened the hollow heel and retrieved the backup mobile Oleg's men had missed.

Its battery stood at 16 per cent, enough for what mattered. I connected it to the estate network and transmitted three compressed encrypted files to trusted British contacts using secure addresses I had established after leaving the Royal Signals. The files included the duplicated alien recordings, my testimony and translated extracts from Sergei's journal. They were people who would preserve the evidence first and ask questions afterwards.

The transfer took four minutes. I spent another twenty genuinely checking videos to support the cover story.

Before leaving Moscow, I had arranged a scheduled public upload as insurance. Now that targeted copies were safely with people I trusted, I postponed that automatic release through a pre-arranged secure link. Broadcasting everything at once might expose the clearing before I could recover the physical evidence. If I failed to check in again, the safeguard would still publish.

Fresh clothes waited in my room when I returned: dark trousers and a button-down shirt, the sort of casual clothing wealthy people wore when trying not to appear wealthy.

I changed, concealed the backup mobile in my heel again and kept the case containing my GBP 200,000 earned balance with me. Then I waited.

A different guard arrived at precisely 19:00 and escorted me downstairs.

The dining room was as long as a village hall. Only two places had been laid, one at each end of the table. Sokolov sat turning an amber drink in a crystal glass.

'Daniel,' he said, as though we were old friends. 'I trust the accommodation meets your standards.'

'It is better than sleeping beneath a tree while alien predators try to eat me.'

A server poured water and set down food. A small steak sat in the centre of an enormous white plate. Sokolov waited until I had taken a bite.

'You are wondering why I chose you.'

'Not particularly.'

The meat was perfectly cooked. I ate because I needed the strength.

'Your survival skills made you suitable, but your public profile also offered useful deniability. If Daniel Mercer vanished after accepting a mysterious Russian commission, your audience would speculate. Few people with influence would investigate deeply. No employer would demand answers. No spouse or children would create diplomatic pressure.'

'Precisely,' I said.

He took another sip.

'The portals were discovered, not invented. Seven years ago, my team found the first natural dimensional rupture in Siberia. Three expeditions disappeared before we learnt to influence it.'

I continued eating and let silence draw more from him.

'Earth is failing,' Sokolov said, spreading his hands. 'Resources are dwindling. The climate is changing. Population pressure worsens every weakness. That other world contains minerals exhausted here centuries ago, and biological compounds capable of transforming medicine.'

'So you are saving humanity by feeding seventeen people to another dimension.'

His expression hardened.

'Pioneers accept risk. The first cosmonauts, test pilots, medical volunteers. History forgives necessary costs.'

While he spoke, I noticed guards repositioning around the room. One stood at each door, another near the windows. Sokolov wanted my cooperation and believed me injured, exhausted and stripped of evidence, but he was taking no chances.

My fork touched the plate with a quiet clink.

'Bathroom?'

There was the slightest pause before he indicated a door across the room.

'Through there.'

Every guard watched as I crossed the open floor.

The bathroom matched the rest of the estate: marble basin, gold fittings and towels too expensive to touch. The door locked with a solid click. A narrow window offered no practical exit.

I had already noticed a service corridor and an extraction vent during my walk from the library. That left the diversion.

The cupboard beneath the basin contained various cleaning products. I combined incompatible chlorine cleaner and acidic descaler inside a sealed waste bin positioned beside the extraction vent. I avoided direct contact, closed the bin and left the ventilation system and the estate's chemical sensors to do the rest. I was not trying to poison anyone. I needed an alarm strong enough to trigger protocol.

Less than a minute later, sirens sounded throughout the house.

They were not ordinary smoke alarms. The building's chemical detection system had registered the fumes near the vent.

I cracked open the bathroom door. The dining room had become controlled chaos. Staff followed an evacuation procedure while guards spoke into radios and redeployed towards ventilation controls, protected routes and Sokolov's extraction point. The alarm had not disabled security; it had merely forced its people to move.

Sokolov was already gone.

I joined the flow for several seconds, then slipped through the service door I had identified earlier. Three turns carried me along a back corridor and out through a staff exit.

The garage stood roughly 50 metres from the main house across open ground. Most guards had been reassigned to the alarm and evacuation, leaving only brief gaps in the camera coverage. I crossed as quickly as my ribs allowed.

Six costly vehicles waited inside. Their keys hung on a board near the door, labelled with neat abbreviations.

A dark Range Rover Sport was marked RRS.

I took its key, lowered myself behind the wheel and placed the case containing my GBP 200,000 on the passenger seat. The engine started almost silently.

With the lights off, I eased out of the garage and followed the service drive around the estate boundary. I had noted this route earlier. It joined a minor road beyond the main gate and avoided the first guard post, though estate cameras would record the vehicle within moments.

I turned west.

Road signs led towards the Latvian border, not Moscow. If I crossed, I could continue to Riga and seek assistance at the British Embassy.

The backup mobile found a signal intermittently between wooded hills. My encrypted files had been delivered.

Nearly two hours passed before headlights appeared in the mirror. The pursuing vehicle maintained precisely the same distance for 15 minutes. It neither gained nor fell back. When I accelerated, it matched me. When I slowed, it did the same.

Someone competent was following.

The border crossing was smaller than I expected: two booths, barriers, cameras and armed officials controlling a quiet road into Latvia. I stopped at the line and waited for Sokolov's trap to close.

The pursuit vehicle halted behind me, far enough back to remain outside the inspection lane.

The Russian guard received a message, glanced towards a monitor and then at me. He barely examined the Range Rover before raising the barrier and waving me onwards. Whatever influence Sokolov possessed, he had used it to release me rather than stop me.

My backup mobile lit with a message as I crossed.

'The world is not ready for this truth, but I respect your survival skills. Go home, Mr Mercer. We will meet again.'

The checkpoint receded in the mirror. The pursuing vehicle remained on the Russian side.

Sokolov had let me go deliberately. The files were already beyond his immediate reach, and killing a prominent British citizen after evidence had been transmitted would create a problem he could not quietly contain. He believed the disclosures manageable. His message was not mercy. It was a calculated threat.

The GBP 200,000 I had earned sat beside me. The original journal, advanced wrist device and ceramic-metal activator remained hidden in the hollow pine near the Siberian clearing. Duplicated recordings and translated extracts had reached trusted contacts in Britain, while the postponed public upload remained ready if I disappeared.

My next task was to reach Riga, contact the British Embassy and find allies capable of helping me recover the physical evidence without leading Sokolov straight to it.

The struggle had only begun.

I had survived another world with experimental technology, practical experience and a refusal to stop moving. Now I faced a different wilderness, one made of money, secrets and people who believed seventeen deaths could be called progress.