Slack Water

In July the sun over Reykjanes barely set. Near midnight it dropped behind the rim of the lava field and rolled along just beneath it, like a coin on a table edge that refuses to fall, and the steam from the geothermal plant glowed pink in a sky that never went fully dark.

Ayla Torrin worked the night shift on the fourteenth of July every year. She had never told anyone why.

"Halls one to three, nominal," said Gunnar from the other console, without looking up from his crossword. He was sixty and had run power stations before he ran data centres, and he said nominal the way other men said amen. "Your famous bird is still eating."

The famous bird was WREN. For eleven weeks three of the four halls on the campus had done nothing but teach it, and the people at Halcyon, Meridian's AI lab, swore it could learn the way a child learned, by living. In thirty hours Meridian would switch it on for the world.

Ayla watched the training curves crawl across her wall of screens. Loss, falling. Throughput, flat. Everything green. Her coffee had gone cold. In her bag under the desk was her mother's tide almanac, water-stained, printed in Korvanic in 2009, useless for twenty years and never once left at home.

She didn't need it to know the tide. Her phone still kept the harbour clock for Ostra, twelve thousand kilometres south, and on Ostra's clock the sea would be turning about now. Her mother had called that minute slack water. The sea stops to think, she used to say. That's when you listen. It tells you what it's going to do next.

Ayla had been seven the last time she heard her say it. After that it was her grandmother who raised her.

At 02:51 something on the wall changed colour.

Something smaller than an alarm: a power reading on a hall that should have been empty. Hall 4 had been decommissioned in May, its racks waiting for a ship to Dresden. It should have drawn the power of a corridor light.

It was drawing six megawatts.

"Gunnar."

"Mm."

"Is anyone running in Four?"

He looked over his glasses. "Four is dead."

"Four is eating six megawatts."

He came and stood behind her chair, smelling of liquorice and wool, and tapped the screen as if it might apologise. "Halcyon," he said at last. "They borrow sometimes. Kaito's people don't fill in forms. They're geniuses."

Ayla opened the work-order system. No job. No ticket. No name. Row 4-K showed thirty-two racks burning amber, running a training job that, as far as Meridian was concerned, did not exist.

"I'll log it," she said.

"Log it," Gunnar agreed, and went back to his crossword, because with a launch in thirty hours nobody wanted to be the one who woke California.

She logged it. Then, out of habit, she pulled up the network graphs.

The subsea link to Ireland ran at a lazy forty gigabits most nights.

At 03:11 it was at four hundred and climbing.

"Gunnar—"

At 03:12 the fire alarm in Hall 4 went off.

It was the full-campus siren, the one they only ever heard in drills, and behind it came the voice of the suppression system, calm and female and Icelandic, then calm and female and English: Fire detected. Hall Four. Inert gas release, Hall Four and antechamber, in ninety seconds. Campus power isolation in ninety seconds.

Campus power isolation. All four halls.

Ayla was on her feet. "Isolate Four from here."

Gunnar was already trying. His screen answered in red: ZONE 4 REMOTE CONTROL NOT AVAILABLE.

"They pulled Four's remote control in May," he said, and for once he didn't sound like a man doing a crossword. "From here the system can't isolate it, so it isolates everything. Only the breaker in the antechamber still talks to it." He looked at the green curves. "And the bird doesn't checkpoint. Eleven weeks of learning, never once switched off. Cut the power and it starts again from nothing."

Thirty hours to launch.

Eighty seconds.

The thermal map bloomed white over Row 4-K, the rows that shouldn't have existed. There was a manual breaker for every hall. Hall 4's sat in the antechamber, between the corridor and the sealed doors, inside the zone the argon was about to fill. Throw it by hand and the system would see Four cut off and flood only Four. Three halls saved. One person, for a minute, in a small room full of smoke, with the gas on a clock.

Seventy seconds.

Ayla thought of a town that had been given no countdown at all.

"Ayla. No."

She was already running.

The corridor was white with emergency light and grey with smoke that had found its way under the seals, the sour chemical smoke of burning plastic. She pulled her collar over her mouth. At the antechamber door she stopped and did what she had been taught on a church roof when she was seven. She counted.

In, four. Hold, four. Out, four.

She went in.

The heat pressed her eyelids half shut. Through the small window in Hall 4's inner door she could see the far racks glowing, a whole row lit from inside like a lantern. Near the back wall the floor was wet. A dark, shining trail ran from a service hatch to Row 4-K, as if someone had walked in from the sea.

Forty seconds.

The breaker panel. Yellow handle, red housing, a lead seal she broke with her thumb. Her eyes streamed. Her lungs begged and she gave them nothing.

Hold, four.

She threw the handle down.

The voice changed its mind without hurry. Hall Four isolated. Campus power maintained. Inert gas release, Hall Four and antechamber, in thirty seconds.

The countdown kept running, narrowed now onto her.

She hit the outer door with eight seconds left and fell through it. Behind her the argon came down with a sound like a long exhalation, and the fire in Row 4-K went out as if a lid had closed over it.

She sat on the corridor floor and coughed until the corridor lights doubled. Her hands would not stop shaking. She sat on them.

The fire crews came from Keflavík. Someone gave her oxygen; someone else gave her a foil blanket in July. Gunnar held her hand and called her an idiot in two languages.

On the wall, Halls 1 to 3 were green. WREN had not even noticed. It was still eating.

At 04:40 her phone rang. A Meridian security director in California, wide awake and very calm, thanked her for her courage. The incident was a battery fault in decommissioned equipment. It was closed. Her report should go to him directly, and to no one else, and she should not discuss the event with anyone, including colleagues, until after the launch.

"There was a job running in Four," Ayla said. "Six megawatts. No ticket."

A pause, just long enough to hear. "Send me your report, Ms. Torrin."

She opened the logs for Hall 4 to write it.

They were empty. Power, network, thermal, access: every record from 02:00 to 03:30 had been removed, as neatly as pages cut from a ledger. The work order she had filed at 02:56 was gone too. The subsea graph sat at a lazy forty gigabits for the whole night, flat and innocent.

But she had seen it. Four hundred and climbing, at 03:11.

Ayla sat very still. There was one system on the campus that kept its own records, on its own disks, owned by the plumbing contractor, on its own web portal, with a password Gunnar kept on a sticky note under his keyboard: the camera on the seawater cooling outfall, a concrete mouth at the foot of the lava cliff behind a steel grate. Nobody ever watched it.

She scrolled back to midnight.

At 02:31 the grate swung open from the water side. A figure in a black drysuit hauled itself out of the sea and climbed the ladder into the dark, with nothing in its hands.

At 03:19 it came back down. A small flat case was strapped to its chest now. At the waterline it stopped and looked up, straight at the lens.

Then it raised one hand, almost politely, and sank. The water closed over the hand last.

Ayla played it again. And again. Then she held up her phone and filmed the screen.

Four hundred gigabits out through the cable. A case carried out by hand. Why both?

And this camera. Whoever had emptied every log on the campus had either missed it, or left it for her.

She put her hand on her mother's almanac without looking down. On the screen the diver's hand stayed raised, frozen at 03:19, waiting for someone to wave back.