The Holding Section

I'd spent three years at sea, working my way up to deck foreman on boats running out of Peterhead Harbour. Three years of sixteen-hour shifts across the North Atlantic and the Norwegian Sea fishing grounds, saving every spare pound I could scrape together. The plan was simple. Put down the deposit on a second-hand creel boat, work it myself and stop making somebody else rich.

Then, five weeks before the purchase was due to complete, I tore my left ankle on a sleet-covered deck, and the whole thing came apart. The surgery swallowed everything I'd saved. Recovery took longer than the surgeon had promised, and the ankle still wasn't right.

It supported my weight, but not as securely as it used to. I could walk. I could work. I simply couldn't move quickly and safely around a deck when the sea turned rough.

No one was hiring deck foremen who might lose their footing when the weather came in. My rent was two weeks overdue when I found the posting. I was browsing a maritime jobs board late at night, the sort of site where most listings were weeks old and half looked fraudulent.

I didn't remember seeing the advert the day before, but it was at the top of the page when I refreshed it.

Site maintenance worker. Deep-water processing station on a remote island in Shetland. Accommodation included. Pay above market rate.

I applied that night. They hired me within forty-eight hours.

The start instructions specified a flight into Sumburgh Airport, where a company vehicle would be waiting. The email included a telephone number I didn't ring and directions I didn't question. I messaged my sister, Bethan, to tell her I'd found work and might be out of contact for long stretches.

She replied, "What sort of place?"

I told her it was a fish-processing station. She didn't ask anything else.

The flight landed at Sumburgh in North Sea haar. I collected the company vehicle from the airport car park. The keys were in the ignition and a card bearing my name had been tucked beneath the sun visor. I followed a narrow coastal road north-east towards Nethervoe Station.

The directions said the journey took eight minutes. I didn't stop or miss a turning, and I kept my speed steady. When I pulled into the gravel car park, my mobile's GPS said I had arrived four minutes late.

My watch said I was four minutes early.

I looked from one to the other, then back at the road behind me. It had been a straight run, with no detours. I filed the discrepancy away and carried on.

Nethervoe Station stood low against the exposed southern coast of Mainland Shetland, a concrete processing building with narrow windows and a flat roof. Below it lay a shore of dark, sea-polished rock, slick even where it looked dry. Offshore, the deep-water survey and recovery platforms were little more than shapes in the haar, grey against grey. The whole place felt as though it had been there far longer than its walls suggested.

There was one other vehicle in the car park, a dark blue Ford Ranger standing near the building. Frost lay thick across its windscreen. There were no tyre tracks around it and no footprints leading to or from the doors. It looked as though it had been abandoned for days, perhaps longer.

I climbed out of the company vehicle and walked towards the entrance. The equipment cage inside smelt of machine oil and salt.

Moira Sutherland was waiting beside a rack of tool belts, holding her second mug of builder's tea. It looked cold. She was compact and deliberate in the way people become after years of doing the same work in the same place. When she spoke, she began halfway through a thought, as if I had missed the first part of the conversation.

"Euan's over there," she said, nodding towards a workbench at the back. "He runs the dock. Graham's on nights. He's asleep."

Euan was cataloguing equipment with his left hand while eating oatcakes from a packet with his right. He appeared to be looking at neither task.

He glanced up when Moira said his name, nodded once and returned to what he was doing.

Moira took a sip of tea and grimaced, as though she had forgotten it had gone cold.

"The last maintenance worker left two weeks ago," she said. "Jamie Flett. Packed up his bunk but left his truck in the car park."

"The blue Ranger outside?"

"We're still waiting for somebody to retrieve it."

She said it as one might mention a delayed equipment order, without giving the matter any weight. I thought of the frost on the windscreen and the absence of tracks, but I didn't ask.

"Come on," she said. "I'll show you the office."

The maintenance office was a narrow room off the main corridor, containing a steel desk, a filing cabinet and one window overlooking the gravel car park. A lever-arch file lay on the desk. Its clear plastic front sleeve held a printed label in block capitals:

HOLDING UNIT PROTOCOL LOG

Moira put down her tea and opened the file.

"This is updated every morning and evening," she said. "At 06:00 and 18:00, you check the units and record their status. If anything is wrong, you radio me. Don't improvise, don't miss an inspection and don't use the telephone."

The file contained printed forms with spaces for the date, time, unit number and temperature. Most of the lines had been completed in the same tight, regular handwriting.

"Jamie's?" I asked.

"Jamie's," she said.

She closed the file and left it on the desk.

"I'll show you the floor."

The processing floor was much as I had expected. Conveyor systems ran the length of the room. There were sorting tables with drains, a cold store at the far end and exposed conduit winding across the ceiling.

It was clean in the particular way industrial places become clean, with every surface hosed down and left to dry. The air smelt of cold brine and refrigerant. Beneath both was something sharper and metallic, like iron mixed with iodine.

I had smelt it before aboard boats working the deep trenches of the North Atlantic. It came with water raised from places it was never meant to leave.

Moira walked ahead without looking back, moving through the station as though she had memorised its layout years ago. At the rear of the processing floor stood a steel door with a keypad lock and a second lock below it for a physical key.

"This is the holding section," she said.

She entered the code, turned the key and pushed open the door.

The room beyond was small and cold, illuminated by a single fluorescent tube that buzzed as it warmed. Six tanks stood against the walls, three on either side of the narrow space. Each was roughly the size of a chest freezer, with a locked lid and a temperature gauge mounted on the front.

Below every gauge was a metal bracket holding a paper card. The cards for tanks 1 to 4 had been filled in with the same tight handwriting. Those for tanks 5 and 6 were blank.

Moira crossed to tank 1 and tapped its gauge with one finger.

"You check these twice a day," she said. "Morning and evening. Write each reading on the relevant card. If the temperature rises more than 2 degrees C above baseline, call me on the station radio, not the telephone. Radio."

I looked at the gauge on tank 5. It was exactly 2 degrees above baseline.

"Like that one?"

She checked it, then drew the radio from her belt and keyed the microphone.

"Sutherland to base. Tank 5 elevated exactly 2 degrees above baseline. Below the mandatory alarm threshold, but logging as a precaution."

She waited. The radio remained silent. After ten seconds, she clipped it back onto her belt, took a pen from her pocket and wrote "normalised" on tank 5's card, although the gauge had not moved.

"What's in the tanks?" I asked.

"Deep material."

She locked the door behind us and handed me the key.

That afternoon, Euan took me down to the dock. The hydraulic hoist was already running, its winch lifting catch bins from the water one by one. Euan stood at the edge with a clipboard, calling out species and weights as they came up.

"Pollock, 18 kilograms. Halibut, 28. Crab, 12."

He worked quickly, sorting each bin with a boat hook and pushing the catch into separate containers without looking up. I stood back and watched. The air off the water was colder than it had been in the car park, and the smell of brine was stronger.

Euan stopped over one bin and went still.

"Huh," he said.

I walked across. Something in the corner was not a fish. It was pale and almost translucent, with a flat circular body about the size of a bicycle wheel and long, narrow extensions that might have been limbs. It wasn't moving.

Euan pulled out his radio.

"Euan to Sutherland. Moira, you need to see this."

Moira arrived three minutes later.

She studied the thing without changing her expression, then took a boat hook from the rack on the dock wall and used it to roll the specimen into a separate sealed container. She was careful not to touch it.

"Surface specimen," she said. "Deep organism. They come up with the survey recovery catch sometimes. We hold them until the collection team retrieves them."

"Who are they?"

"Marine research office in Lerwick. I've never met them."

She looked at me.

"Help me move this."

She gave me a pair of thick rubber gloves and took one end of the container. I took the other. Euan stayed where he was.

We carried it across the dock and through the processing floor to the holding section. Moira unlocked the door, and we placed the container in front of tank 6.

"This one goes here."

We lifted the container. The thing inside shifted slightly, as an object underwater might move when the current changed. I kept my grip and avoided looking directly at it. We tipped the container, and the specimen slid into tank 6. The water rippled once, then settled.

The specimen moved.

It made a slow lateral flex, like something drawing a single breath, and became still again.

Moira's expression did not change. She locked the lid and wrote the time on tank 6's card.

Euan, who had followed us in, put down his end of the container for a moment before lifting it again.

"That's it," Moira said. "You're logged in."

She locked the holding-section door and returned to the processing floor without another word.

I spent the rest of the day checking the conveyor systems and cold store. I did not go back into the holding section.

The company accommodation was a prefabricated staff block about a mile along the single-track coast road. It stood back from the shore on a concrete pad. Inside were four bunk rooms, a shared kitchen and a bathroom with a shower that took three minutes to run warm.

My room was the second on the left. The bunk was narrow and the mattress thin, but everything was clean. I sat on the edge and took out my mobile.

The signal was weak, but it was there. I sent Bethan a message.

Work is fine. Place is remote. Signal will be patchy.

She replied a minute later with a photograph of Moss, her brindled lurcher, lying on the sofa with his head on a cushion.

I put the mobile beside me, leaving the photograph on the screen, and stared at the ceiling.

The drive to the station the next morning took thirty-eight minutes.

I did not stop. The road was straight, with only the usual passing places, and I did not take a wrong turning. My watch showed that thirty-eight minutes had passed. The journey history on my mobile's GPS agreed. Yet when I arrived and compared my watch with the station clock, the two displayed the same time, as if I had made the eight-minute journey I had been promised.

I parked beside Jamie's Ranger and went inside.

The holding section required the separate key Moira had given me. I unlocked it, stepped through and pulled the door shut behind me. The 06:00 procedure required temperature readings and visual confirmation of status.

Tanks 1 to 4 were normal. I recorded the readings on their cards with the pen clipped to the protocol file I had brought with me. Tank 5 stood 1 degree above baseline. I wrote that down as well.

Tank 6, containing the previous day's specimen, showed a normal reading. The protocol required visual confirmation, so I unlocked and raised the lid.

The tank was empty.

I lowered the lid and checked the holding-section door. It was locked from the inside with my key, which had remained in my possession since the day before. The door was undamaged. So was the tank.

I pulled the radio from my belt and pressed the transmit button.

"Moira, it's Callum in the holding section. Tank 6 is empty."

Static came first, then her voice.

"I'm coming."

She arrived four minutes later. I was standing before tank 6 with the protocol file beneath one arm.

She did not ask me to repeat myself. She went straight to the tank, opened it, looked inside and lowered the lid. Then she inspected the other five tanks, opening each in turn.

At tank 2, she stopped.

Its card recorded the admission of a small, slow-moving organism three weeks earlier, written in Jamie Flett's hand. The most recent entry was dated that day and written in the same hand.

Jamie had disappeared two weeks ago.

Moira held the card for a long time, reading it with her face completely still. Then she opened tank 2.

It was empty.

She turned to me.

"Stay on the processing floor. Don't go down to the shore."

She left the holding section without locking the door behind her. I heard her cross the processing floor, followed by the opening and closing of the exterior door.

I remained where I was. Both tanks were locked. Both were empty. There was no sign of forced entry. Two specimens were unaccounted for.

I clipped the pen back onto the lever-arch file, left the holding section and locked the door behind me.

Ten minutes later, Moira returned through the exterior door carrying a reporter's notebook with a wire binding at the top. She passed me without speaking and entered the maintenance office. I followed as far as the doorway.

She stood at the desk and read two pages in silence. The desk lamp caught the edge of the paper, and I could see tight, regular handwriting running from margin to margin.

She closed the notebook, unlocked the maintenance-office safe with a key from her pocket and placed it inside. Then she locked the safe and turned to face me.

I didn't ask what she had read. She didn't offer to tell me.

Two days passed without incident. I completed the checks at 06:00 and 18:00, recorded the temperatures and kept the cards up to date. On the morning of the third day, tank 5 rose to 1 degree above baseline, then returned to normal by the evening inspection.

I recorded both readings.

On the fourth day, the same thing happened. It stood 1 degree above baseline at 06:00 and was normal again by 18:00. I sat at the maintenance-office desk with the protocol file open and wrote the second baseline entry on tank 5's card.

The writing looked like mine, but I had to think about the shape of every letter, as if I were learning to write again.

I clipped the pen back onto the file. The office was quiet around me. The desk lamp gave off a low electrical hum. Beyond the small window above the desk, the haar had returned and the light was fading.

I still had not asked Moira what she had read in Jamie's notebook, and she still had not volunteered it.

Later that fourth day, Moira was called to the dock for a supply delivery. She found me in the maintenance office, going through the protocol file and checking my entries from the previous three days.

Every one was in my handwriting. Every one looked correct. Still, I kept reading them as though trying to convince myself I had actually written them.

"I need to handle the crane offload," she said from the doorway. "You're on holding-section watch until I return."

I looked up from the file.

"How long will it take?"

"Twenty minutes. Perhaps thirty if the crane starts playing up again."

She leant against the doorframe with her arms crossed.

"Same procedure as always. If anything rises more than 2 degrees above baseline, radio immediately. Do not open the tank."

I nodded.

She remained in the doorway for another few seconds, watching me, then turned and left. I heard her boots cross the concrete processing floor, followed by the heavy exterior door opening and closing.

I sat for a minute with the file open in front of me. The desk lamp hummed. Beyond the small window, the haar was beginning to turn the gravel car park into a grey blur.

Then I got up and walked to the holding section.

The steel door was already unlocked. I had conducted the morning inspection two hours earlier and had not bothered to lock it afterwards.

The six tanks stood in their usual arrangement, three on either side of the narrow room, each with its gauge and card bracket. The readings were all normal. Tanks 1 to 4 showed baseline. Tank 5 was 1 degree above, as it had been for the previous two days. Tank 6 remained empty, as it had since the morning I discovered the specimen missing.

I stood looking at the gauges without moving.

Eleven minutes later, the alarm sounded.

It was a loud, flat warehouse buzzer mounted on the wall above tank 3, the sort of sound that made you want to cover your ears. Instead, my hands were already reaching for the radio on my belt.

I pressed the transmit button.

"Moira, tank 3 alarm. Do you copy?"

Static.

I waited five seconds and tried again.

"Moira, tank 3 temperature alarm. Do you copy?"

Nothing.

I changed channels and called Euan.

His reply came back clipped and tense.

"Yes?"

"Tank 3's alarm has gone off. Is Moira with you?"

"She's on the crane. We've got a problem with the winch. She's occupied."

The buzzer continued.

Tank 3's gauge read 4 degrees above baseline. I moved closer and examined the card in its bracket. The writing belonged to Jamie, the same tight, regular script I had seen on the first four cards when I arrived. The specimen had been admitted seven weeks earlier.

The description read: "Sessile, non-reactive."

I looked back at the gauge. Four degrees above baseline. Eighteen minutes earlier, at my last check, it had shown no increase at all.

The lid of tank 3 was slightly open. Not raised, merely unseated, with perhaps a centimetre of clearance where its front edge met the rim.

I had not noticed the gap during the morning check. Or perhaps it had not existed during the morning check.

I stared at it for a long time.

The protocol said not to open the tank. I wasn't opening it, but neither was I prepared to let it open itself.

I placed both hands on the lid and pressed down. The metal was cold and wet beneath my palms. I pushed until it seated fully against the rim, then kept pushing, maintaining steady pressure.

The alarm continued.

I lowered myself to the floor without releasing the lid and sat with my back against the front of the tank. My hands remained flat against the metal. The concrete was cold through my jeans, the tank was cold against my spine, and after the first minute the buzzer was so loud that I ceased to hear it properly.

Something inside shifted its weight.

I felt the movement through the metal, a slow lateral turn like an animal rolling over in its sleep.

Then it became still.

I did not move. The minute stretched. I kept my hands on the lid and my back against the tank.

My shoulders began to ache, then my lower back, then my thighs. Once, I adjusted my grip, spreading my fingers wider while maintaining the pressure.

The specimen moved again.

This time it was closer to the lid.

I felt its weight pressing upwards against the underside of the metal, testing it. The pressure was not forceful. It was gentle and exploratory, like someone trying a door to discover whether it was locked.

I pushed down harder.

The pressure stopped. Whatever was inside became still again.

I counted the seconds in my head, the way I had counted them on deck while we hauled lines in worsening weather and needed to judge how long remained before the next swell struck.

I reached sixty and began again. Then I reached sixty a second time and carried on.

The buzzer sounded throughout.

At some point, the temperature gauge began to fall. I did not look at it. I kept my hands on the lid, my back against the tank and the count running in my head.

When the holding-section door opened, I had counted to sixty twenty-two times.

Moira entered and stopped just inside the doorway. She looked at me, then at the tank, then at the gauge. The alarm was still sounding.

She crossed the room and switched it off.

The silence was immediate and absolute.

"How long have you been holding it?" she asked.

"Two minutes."

She looked at the gauge. It had returned to baseline, perhaps half a degree below it. She put one hand on the lid beside mine and nodded.

I removed my hands and stood. My legs felt loose and weak, and I had to steady myself against the wall.

Moira unlocked the lid and raised it.

The specimen lay at the bottom of the tank beneath about 60 centimetres of cold seawater. It was pale and flat, roughly circular and perhaps the size of a dinner plate.

It looked exactly as the card described it. Sessile, non-reactive. It did not move when the light reached it.

Moira leant over the tank and examined the underside of the lid.

She became very still.

I moved closer and followed her gaze. Thin, parallel striations marked the inside of the lid, perhaps a dozen, arranged in neat rows across the metal.

They looked fresh. They had not been there the last time I saw the inside of the lid, two days earlier, when Moira opened the tank after the first temperature rise.

She took out her mobile and photographed the marks. The artificial shutter sound was the only noise in the holding section.

Two days later, Euan's voice crackled over the radio before the hydraulic hoist had fully risen.

"We've got three," he said. "Three in one load."

Moira was already heading for the door before I could ask what he meant. I followed her to the dock.

The hoist was still settling when we arrived. Euan stood at the platform's edge with his hands hanging at his sides. He was not moving.

The catch bins came into view, and I understood. Three separate bins held three shapes that were not fish.

Moira approached the first. The specimen inside was small, perhaps the size of a dinner plate, and translucent enough for the metal floor of the container to show through it.

It did not move when she leant over it.

"Tank 1," she said.

We transported it as we had the others, using thick rubber gloves and a sealed container, then carried it across the processing floor to the holding section.

The specimen remained motionless throughout. When we lowered it into the water in tank 1, it sank halfway, then drifted sideways until it pressed against the tank wall. It stayed there, turned towards the room, flat against the glass like something watching us.

Euan had followed us inside. He stood in the doorway, staring through the glass.

"Looks as though it's reading the room," he said.

He said nothing else.

We returned to the dock.

The second specimen was larger and dark, with a body more structured than that of the translucent one. Bilateral formations ran along what I assumed was its front edge. They were smooth, slightly raised and arranged in pairs.

"Sensory organs," Moira said as she studied them. "Don't get too close."

I helped her lift the transport container. The specimen shifted while we carried it, and the formations along its edge angled towards me.

I stepped left to adjust my grip. The formations followed.

I moved again. They tracked me, maintaining their orientation wherever I stood.

"Tank 4," Moira said.

We logged it in.

The specimen entered the water without resistance, but its sensory structures remained directed towards the lid even after we closed it.

The third bin was still on the dock when we returned. Euan stood roughly 3 metres away, holding his radio. He had made no attempt to move it.

When I came close enough to see inside, I understood why.

The specimen had arrived in separate pieces. Every section moved independently, but all were slowly drawing together. The extensions were not limbs in any conventional sense, though they served the same purpose, reaching and pulling until the fragments made contact.

One extension had wound itself around the handle of the boat hook Euan had tried to use. It was not pulling. It was simply holding on.

Euan keyed his radio.

"Moira, you need to come to the dock."

She was already standing beside us. She stepped past me and looked into the bin for a long time without speaking.

"This one cannot go into a tank," she said at last. "We have no protocol for a specimen of this size."

She took several photographs with her mobile, then turned and walked back towards the building without another word.

The specimen stopped reassembling.

I remained where I was, watching it. Its extensions did not move. The one around the boat-hook handle neither tightened nor released.

It was waiting.

I could not have explained how I knew that, but I did.

Moira returned five minutes later with the protocol file beneath one arm and Jamie's notebook in her other hand.

"The Lerwick operations line is disconnected," she said. "Not engaged. Disconnected."

She opened Jamie's notebook to the last page containing writing and read aloud.

"Lerwick hasn't answered in six weeks. I think the collection team has stopped coming. I think the tanks are the collection."

She closed the notebook.

"Leave it where it is. Both of you, go inside."

The specimen remained in the dockside staging area, inside the catch bin, with the boat hook still held in its grip.

That night, the station's emergency satellite link stopped carrying telephone traffic.

I was in my bunk at the staff block when I realised. I had spent twenty minutes trying to message Bethan. The message would not send, and neither had the three I had attempted that afternoon.

I checked the connection status on my mobile. The internet service was still operating. The telephone relay through the satellite link was down, preventing calls to HM Coastguard, Lerwick shore control or anyone else ashore.

I heard footsteps in the corridor, followed by the kitchen tap running.

Graham was standing at the sink when I entered. He filled a glass, turned off the tap and sat at the table.

"The signal drops when the water is doing something," he said.

He drank half the glass and set it down.

"I've worked night watch here for two years. There have been four maintenance workers in that time. All four left. Only two were still normal when they went. The other two started keeping their own logs."

He reached into his jacket and removed a folded sheet of paper. He opened it on the table and slid it towards me.

It had been torn from a top-bound reporter's notebook and was covered in tight handwriting that did not belong to Jamie. The lines were compressed, and the margins were crowded with notes that bled into one another.

I began to read.

The writer had documented a theory. The specimens were not being held for collection. They were being sorted.

Something in the water was using Nethervoe Station to identify which deep-water organisms could acclimatise to surface conditions and which could not. Those that acclimatised were allowed to leave the tanks. Those that failed were retrieved.

The two tanks that had emptied, tanks 6 and 2, had contained specimens that passed.

"The tanks aren't storage," I said, more to myself than to Graham. "They're a filter."

"Whatever is keeping track of the ones that survive," Graham said, "it knows how many tanks there are."

The radio on the worktop crackled once, then fell silent.

A moment later, temperature alarms began sounding. Not one alarm, but three simultaneously. Their overlapping tones merged into a single sustained noise, carried through the relay and filling the kitchen.

Tanks 1, 3 and 4.

Graham stood and crossed to the radio. He did not switch it off. He merely looked at it.

I returned to my room.

The alarms continued. I could hear them through the walls and floor, a steady mechanical howl that never altered in pitch or volume.

I sat on my bunk with my back against the wall.

They sounded for forty-three minutes.

Then the relay went silent. The signal cut out, and the alarms stopped.

I did not move.

I woke at first light on the processing-floor concrete, cold seeping into my back and my radio still clutched in one hand.

I had no memory of lying down there.

The station was quiet. I got to my feet and walked through the equipment cage towards the entrance.

Moira's car stood outside in the gravel car park, its windscreen coated with frost. Jamie's dark blue Ranger beside it looked exactly as it had the previous day.

The break room was empty. No tea had been made. A cold mug sat abandoned on the worktop.

I found Moira's radio on the floor beside the conveyor line. Its battery was dead. I picked it up and turned it over in my hands. The casing was warm, as though it had been operating until moments earlier.

I put it on a sorting table and went to the dock entrance.

Euan stood outside at the far end of the concrete platform, where the hydraulic hoist rose from the water. His back was towards me and his hands hung at his sides. He was not sorting catch. There was no catch bin on the hoist.

I called his name.

He did not turn.

I approached, my boots loud on the concrete. Haar rolled in from the sea, thick enough to erase the offshore survey platforms. Visibility was no more than 6 metres before everything dissolved into grey.

"Euan."

He did not move. His head was tilted down towards the water. When I drew near enough to see his profile, I saw that his eyes were open and his mouth slightly parted.

He looked as though he were listening to something.

I touched his shoulder.

He did not react.

I stepped back and looked into the water below the dock. Its surface was flat and dark, without movement. The smell of iron and iodine was stronger than usual, thick enough to taste.

I left Euan where he stood and went back inside.

The holding-section door was unlocked. I opened it and entered the narrow room where the six tanks lined the walls.

The lids of tanks 1, 3 and 4 stood open.

Their temperature gauges showed ambient conditions.

I crossed to tank 1 and looked inside. It was empty. The water remained clear all the way to the bottom.

Tank 3 was empty.

Tank 4 was empty.

All three tanks that had alarmed during the night were open and drained.

Tank 2 was closed and locked, its gauge reading normal. I examined the card. An entry in Moira's handwriting stated that the specimen had returned and been readmitted the previous day, although no ordinary admission process had taken place. The entry was dated and signed.

I moved to tank 5.

Its gauge stood exactly 2 degrees above baseline. The card bore entries I did not recognise, all in tight, regular writing. The dates were recent and the notes brief. I had no idea who had written them. They went back six days.

Tank 6 was the same.

Occupied.

Its card had been filled in by a hand I had never seen.

I stood between the two tanks, trying to remember whether I had opened them, logged them or watched Moira open them. Nothing came.

Tank 5's gauge ticked upwards to 3 degrees above baseline.

I stepped closer. The lid was locked. I placed one hand on its metal surface.

It was warm.

The gauge climbed to 4 degrees above baseline.

Something moved in the water. I heard a slow dragging sound against the tank wall.

I removed my hand and backed towards the door. I did not turn around. I kept watching tank 5 until I reached the corridor.

Graham stood roughly 3 metres away with his back to me, Jamie's notebook open in his hands.

He was reading aloud in a flat, steady voice, without inflection or pauses between sentences.

"Lerwick hasn't answered in six weeks. I think the collection team has stopped coming. I think the tanks are the collection."

He turned the page.

"Tank 2 reoccupied. Same specimen. Logged return at 04:30. No damage to lid or lock."

"Graham," I said. "I think it knows the layout now."

He continued reading.

"Satellite telephone relay down. Internet connection functional. Radio relay functional, but no response from Lerwick shore control. Moira not answering. Euan not answering. I think the sorting is finished."

I moved closer. His eyes travelled steadily across the page, following the words.

His voice did not change.

"Tank 5 occupied. No admission record. Log card already filled. I didn't fill it."

I reached out and touched his shoulder.

He turned the page and continued reading.

I left him there and walked towards the front of the building.

The exterior door remained closed. I pushed it open and stepped onto the gravel shelf.

The haar had thickened. I could see no more than 3 metres before the world became solid grey.

The dock was empty.

Euan had gone.

I walked to the platform's edge and looked down. The water was flat. There was no movement and no sound except the low hum of the offshore survey platforms somewhere beyond the haar.

The staging area where we had left the third specimen was clear. Its catch bin lay overturned on one side. Faint parallel marks crossed the concrete from the bin to the edge of the dock.

They were thin grooves, as though something had dragged itself over the surface.

I stood at the building's exterior door, with the haar closing in at 3 metres and the dock empty where Euan had been only minutes before.

I was alone outside.

I walked towards the water. Gravel crunched beneath my boots, every step unnaturally loud in the haar.

Ahead, barely visible, Moira stood at the edge of the shelf where the ground fell away towards the shore of dark, sea-polished rock.

"Moira," I called.

Moira turned to face me. Her eyes were tracking properly. She was there, fully present. Not like Graham in the corridor, or Euan on the dock.

She was herself.

In one hand she held a tank log card, a sheet of white paper inside a clear plastic sleeve. I could see writing on it even from roughly 3 metres away. I reached her and stopped.

The water lay directly below us, flat and black, with the haar resting on it like a lid.

"What did you do?" I asked.

She did not answer at once. She looked down at the card in her hand, then back at me.

"I think whatever is operating in the water has been doing this for longer than the station has existed," she said. Her voice was quiet and steady. "I called them this morning on the emergency satellite link. I told them we were ready. They said they were coming to carry out an inventory."

I looked at the card. Tank 6. Today's date at the bottom, filled in in her handwriting, with a single word beneath it.

Acclimatised.

I looked back at the water.

There was movement. Not surface chop. Not waves. Something underneath, moving slowly and with purpose.

Circular shapes, each roughly the size of the specimens from the tanks.

Several of them were moving outwards from the shore in a loose formation, as though they were spreading apart after gathering close together. I counted four, then five, then stopped counting.

Moira stood beside me, still holding the card. She did not speak.

Neither did I.

The shapes continued through the water without breaking the surface. Their outlines were visible only because the haar made the black water just translucent enough for us to see them. They travelled in different directions, each following its own path, but all of them moving away from Nethervoe Station.

One by one, the fog swallowed them.

The final circular shape passed beyond the edge of visibility and disappeared into the grey. The water became still again. Flat. Empty.

Moira and I stood in silence on the gravel shelf above the shore of dark, sea-polished rock.

I woke on the processing-floor concrete with my cheek pressed against the cold surface.

The headache came first. Then the confusion over how I had got there.

Graham stood over me with a mug of coffee in his hand, looking down with the same flat expression he always wore. He did not ask whether I was all right.

He simply waited.

I pushed myself upright. My watch showed 09:47. The last thing I remembered clearly was standing on the gravel shelf with Moira, watching the shapes move through the water.

"How long was I out?" I asked.

Graham shrugged.

"Found you here about twenty minutes ago," he said. "Thought you might want coffee."

He held out the mug.

I took it. My hands trembled slightly as I raised it to my lips. The coffee was lukewarm and tasted as though it had been standing for hours.

Across the processing floor, Euan was sorting a fresh catch at the conveyor, both hands moving steadily through the bins. There were no oatcakes beside him and no radio clipped to his belt. He glanced up once when I got to my feet, nodded, then returned to his work.

Everything looked normal.

The smell of brine and refrigerant. The hum of the conveyor. The overhead lights throwing their usual shadows across the equipment.

But the holding-section door was open.

I walked towards it slowly, still carrying the mug. Graham did not follow. He remained where he was, watching me go.

The door swung wider when I pushed it. The holding section was lit by the same fluorescent strips as always. Six tanks stood in their row, numbered 1 to 6. Every lid was open. Every tank was empty.

I moved along them, checking each in turn.

The water had been drained. Every temperature gauge showed ambient conditions. The log cards in their brackets were blank. They had not been replaced or removed. They were simply blank, as though nothing had ever been written on them.

I pulled the card from tank 3 and held it up to the light.

Clean white paper. No trace of ink. No indentations left by a pen pressing through the sheet.

My hands were still shaking.

I returned to the processing floor. Graham was leaning against the equipment cage with his arms folded.

"What happened to the tanks?" I asked.

He looked at me for a long moment before replying.

"Holding section's been decommissioned for equipment maintenance," he said. "Has been for the past two weeks. You knew that."

I opened my mouth to argue, then stopped. His face showed nothing. No concern. No confusion. Nothing at all.

"Moira called this morning," he continued. "Said she'll be back on the island by Friday. Supply run was delayed."

I stared at him.

"Moira was here," I said. "On the beach."

Graham shook his head.

"Moira's been off site since last Tuesday," he said. "She's been in Lerwick, coordinating with the offshore survey company about the automated programme. You logged it yourself."

My pulse hammered in my ears.

I looked towards Euan. He was still sorting the catch without glancing up. His movements were smooth, practised and completely normal.

I placed the coffee on the nearest workbench and pulled my mobile from my pocket.

Three messages had been sent to Bethan between midnight and 02:00.

The first read, "I'm fine. Work is good."

The second said, "Station's quiet, just routine maintenance."

The third read, "Everything's normal here. Don't worry."

I did not remember sending any of them.

Below the third message was Bethan's reply.

"Okay, good. Was starting to worry."

I scrolled back through the conversation. The last message I genuinely remembered sending was from my first week, when I had told her how remote the place was and warned her that the signal would be unreliable.

The three new messages were there in my conversation with her. They had come from my number and been sent from my mobile, but I had not written them.

My hands were shaking harder now.

I shoved the mobile back into my pocket and went to the maintenance office. The door was unlocked. Inside, everything looked exactly as it always had.

The metal desk. The filing cabinet. The safe in the corner. The protocol lever-arch file resting on the desk where it belonged.

I pulled out the chair, sat down and opened the file.

Fourteen days of entries had been written in my handwriting.

I turned back to the first page. The date was from two weeks earlier, the day after I had arrived at Nethervoe Station. The entries followed exactly the format Moira had taught me: time, date, tank number, temperature reading and status notes.

Every entry was in my hand.

The loops of my Ys. The angle of my capital Ts. My abbreviation for temperature - "temp", never the full word.

I turned the pages.

Every one was the same. Morning inspections at 06:00. Evening inspections at 18:00. Temperature readings for all six tanks. Status updates.

Everything precise. Everything detailed. Everything procedurally correct.

Tank 3's temperature had spiked on the fourth day. I had logged it.

"Temp 4 degrees above baseline. Alarm triggered. Supervisor notified."

I remembered that. I remembered holding the lid down.

Tank 6 had received a new specimen on the second day. I had logged that too.

"Surface specimen admitted 14:20. Responsive. Baseline temp achieved."

I remembered that as well. The thing flexing in the catch bin as we carried it.

Page after page. My handwriting. My records.

Fourteen days of routine maintenance logs, written as though nothing unusual had happened at all.

But I did not remember writing them.

I turned to the final page. Today's date was printed at the top. At the bottom was one last entry.

"All units clear. Inventory complete. New intake expected Friday."

The line beneath it was blank.

I looked at the printed field at the top of the page, labelled "Responsible party".

My name was there.

Callum Price.

But it was not in my handwriting.

It was in Jamie Flett's.

The same tight, regular hand I had seen on the first four log cards when Moira walked me through the holding section on my first day. The same handwriting I had seen in the entries in Jamie's reporter's notebook, the ones Graham had shown me.

I stared at my name for a long time.

The fluorescent light above me buzzed faintly. Somewhere on the processing floor, the conveyor hummed. Euan's voice drifted through the open office door, calling out species and weights to no one in particular.

I looked down again at the page, at my name written in another man's hand, and at the blank line beneath the final entry.

Waiting.