Saltlock

The Last Plane

The last plane was a black speck swallowed by a sky the color of a bruise, and I stood on the apron counting the seconds until the sound of it was gone too.

Eleven. Twelve. At this altitude the engines carry strange — thin air thins everything, even noise — and the Twin Otter's drone stretched and frayed and then there was only the wind starting up in the guy-wires, a low fluting note I'd come to hate. Fourteen. The speck folded into the front piling up over the western cordillera, that bank of cloud the exact shade of a four-day-old contusion, yellow at the edges and going to black in the middle. Fifteen. Gone.

I'd watched the pilot, Quispe, do his arithmetic on the strip while we threw cargo. He hadn't cut the engines. He'd taken one look northwest, said señora, this one's early, and started chivvying us before the props had stopped wanting to spin. A good pilot does sums the way I do, in margins and worst cases. He'd shaved his to nothing to get back over the pass, and he still might not make it, and that told me everything I needed about the next four days.

So I rationed. It's a reflex by now, like flinching. Diesel: nine hundred liters in the day tank, the bulk tank topped this morning, call it sixteen days of generator at the load we ran in a hard blow. Oxygen in the medbay: eleven bottles, and you do not touch those for headaches, those are for the day somebody's lungs fill up at four thousand seven hundred meters and start drowning them on dry land. Water — I always came back to water — the well brine, the desal stack, the little atmospheric harvester that wrung maybe forty liters a day out of air that had no business holding any. Food was Lena's problem and the cook's. Air and heat and water and power were mine. I am the stationkeeper. I keep the station. When it kills somebody it will be because I let it, which is why I don't let it.

"You the engineer?"

The passenger. I'd half forgotten him in the noise — the unexpected one, the name that hadn't been on Tuesday's manifest and was on this one in a different font, like somebody'd added it after. He had a duffel over one shoulder and a hard case in the other hand and a small camera already up, already running, the little red eye watching me watch the sky.

"I'm Reyes," I said. "Mara. You're not on my list."

"Dane Marsh." He put the camera down a degree, which I noticed because men who film don't lower the camera for just anyone. "Documentary. The discovery of the century, they tell me. Halberd flew me in." He coughed, the dry tickle everybody gets the first hour up here, and waited for the next breath to come and it didn't quite, and I watched him learn the lesson the mountain teaches in the first minute: you are at fifteen thousand feet and your body is a poorly funded project. "God," he said. "Is it always like this?"

"It gets worse after dark." I shouldered his hard case before he could argue — newcomers carry their own bags and pay for it — and pointed him at the habitat with my chin. "Walk slow. Talk less. Welcome to Ojo Negro."

He looked where I'd pointed, past the modules, out to the place the station was named for — the black eye in all that white, a hundred meters off, where the salt crust went grey and then went nothing, a hole in the flat that breathed cold. He raised the camera again at it.

"Don't go near that," I said. "We lost a man there last season. Field tech. Quino. The crust lies about where it ends." I heard myself and stopped. The crust lies about where it ends. I'd said it like a tour guide. Quino Mendez had been twenty-nine and good with his hands and they'd told me he walked out at night and the salt opened under him, and I'd never met him, and I thought about him every time I crossed the apron anyway. "It looks solid. It isn't. That's the whole place, really."

Marsh lowered the camera all the way. "What was his name again?"

"Quino," I said, and didn't know why he wanted it twice, and filed that away with the font on the manifest, in the drawer where I keep things that don't sit flat.

─

Inside, the station was doing what stations do before a storm: pretending to be calm.

Reinholt had the common room mirror and his own reflection, and he was rehearsing. "—what we have found beneath this salt will be remembered," he told the glass, one hand spread, "as the moment humanity—" He saw me and the hand came down. "Mara. Is the link stable? I want the announcement to go clean. We have waited a long time for this." He always said we. I'd learned it meant I. The discovery of the century, and he was practicing his face for it.

"Ask Kit about the link," I said. "I keep the things that don't talk to satellites."

Brandt had a clipboard, of course Brandt had a clipboard. He'd cornered the new biologist and the cook by the airlock and was reading the lockdown checklist aloud in the voice men use when they've decided the checklist is what stands between them and the dark. "—exterior hatches dogged and logged, generator shed on auto-failover, headcount confirmed by role at twenty-one hundred. Stationkeeper." That was me. "Lifelines walked at lights-out, confirmed to ops."

"Walked every night," I said. "I'll confirm to the wall if ops is asleep."

He didn't smile. Brandt by-the-booked everything; it's what they bred into him before the program spat him out, and a man who runs on checklists is a comfort right until the day the situation isn't on the list. "Confirm to ops," he said, and ticked a box, and I let him have it.

In the lab block they were already fighting. Noor and Beto, through the glass of the biosecurity wing, the good kind of fighting, the kind I trust. Noor had a tray of vials cradled like eggs and was humming, that tuneless thing she did when her brain was elsewhere, and Beto was blocking the cold-room door with his whole body and saying something about pressure and the salar, she doesn't like to be rushed, he meant the flat, he always meant the flat, he called the salar she the way other men called boats.

"You cannot pull from the deep cores tonight," Beto was saying. "If the power so much as flickers—"

"If the power flickers we have bigger problems than my samples," Noor said, "ask the engineer," and they both looked at me through the glass and I gave them the flat hand: not now, not my fight, secure your room. Noor's eyes held mine a half-second too long. Whatever was in those vials, she was carrying it like it was the only true thing in the building.

Lena was at the med hatch handing out the evening's pills, the little acetazolamide tablets that bully your kidneys into thinking you're lower down than you are. She read me as I passed — she read everyone, took your pulse with her eyes — and held out a tablet without my asking. "You skipped this morning's," she said. Not a question. "Your color's off, Reyes. Take it."

"I'm always this color." I took it anyway, dry, and didn't tell her about the flask in my hip pocket that did more for my nights than her chemistry, and she watched me swallow with the small clinical satisfaction of a woman ticking her own box.

And Kit. Kit was in the comms closet with the rack open, fingers going tap-tap-tap on the desk edge between keystrokes, a kid's nervous percussion, and he was talking to the uplink like it was a boss fight. "Come on, come on, give me the bird, give me the bird—" He had the green light. He lost it. He got it back. Everyone in the station depended on that one antenna and exactly one of us understood it, and it was the twenty-nine-year-old in the band t-shirt who made jokes nobody laughed at.

"You good?" I asked.

"Define good." He grinned without looking up. "We're good. Link's flaky in wind but I'll hold it through the doctor's pills and the boss's big speech, then it's anyone's game." He cracked his knuckles. No headache pinch between his brows, no shallow newcomer breathing, none of the thousand-yard squint the altitude puts on people in their first month. He worked the rack like a man at sea level. I'd noticed it before and noticed it again now and put it in the drawer with the rest: Kit never gets sick up here. Six weeks in and pink as a baby. Lucky lungs, I'd told myself. I told myself a lot of things that season.

─

The white came before dark, the way it does — not snow, here, but salt and ice and grit lifted off the flat in a wall, and the wall hit the windward modules with a sound like surf and the light outside went from glare to milk to nothing in under a minute. La Cabra, our one hauler, sat hunched at the garage mouth getting buried, the only thing on this rock that could carry eight people down the one road, and I watched the storm pack white against her tracks and start to make her a part of the landscape.

In the common room Reinholt cleared his throat at the screen. "Colleagues. Investors. Friends. Tonight from Estación Ojo Negro I am proud to—"

The screen ate him. Not froze — ate him, the call window collapsing to a spinning ring and then to a flat blue and then to a small grey box that said NO SIGNAL in the patient font of a machine that does not care.

"Kit," Reinholt said.

"On it." Tap-tap-tap. "On it. It's the front, it's just the front, give me—" Nothing. "Okay," he said, and his voice did a thing I'd hear again later and understand too late: it went flat. Just for a word. "It's down."

Brandt was already standing. "That's storm-lock," he said, and for once the checklist and the world agreed. "No flights. Road's gone. No contact until this clears. Days, minimum. Headcount by role at twenty-one hundred. Stationkeeper—walk your lines."

So I walked them. Habitat, warm and breathing. Generator shed, the diesel's heartbeat steady under my palm. Water plant, last, the desal stack ticking, the harvester whispering its forty liters out of the storm. I ran my light along the feed manifold the way I did every night, hand following eye, and stopped.

The seal on the number-two coupling — a fat black O-ring of nitrile that should have been smooth and tight — had gone soft. Pale. Eaten into a fine grey lace, a doily of corrosion, the kind of pattern frost makes on glass except this was rot, this was something that had been chewed. I pressed it with a fingernail and it gave like wet bread. I'd replaced that ring eight weeks ago. Nothing in my chemistry, nothing in this water, nothing I knew ate nitrile like that.

I stood there with the wind hammering the wall a meter from my face and I thought, in order: that's wrong. That's not wear. That's not cold. And I didn't have a fourth thought yet, just a cold spot under the breastbone that had nothing to do with the temperature, and the storm leaning on the building like it wanted in.

I went back to the comms closet to flag it to someone, anyone, and found Kit gone and the rack dark and the little uplink indicator on the wall — the green eye that meant the world still knew we were here — gone from green to nothing.

And the wind started to scream like it had somewhere to be.

Stationkeeper

At fifteen thousand feet your body is a poorly funded project; it does the minimum and complains about it. I woke with the usual invoice behind my eyes — that dull pressure the altitude charges you for the privilege of breathing — and lay in the dark counting the station's heartbeat before I trusted my own. Habitat blower: steady, a low D under everything. Glycol loop ticking as it warmed the walkways. The generator's far cough through two hundred metres of insulated wall. Eight people's worth of oxygen being pushed and pulled by machines I'd checked at midnight and would check again at six. The numbers were where I'd left them. People I was less sure about.

Outside, the storm had stopped pretending to be weather and become geology. The wind came off the salar in long slabs that you felt in your molars before you heard them, and when I cracked the porthole shroud there was nothing — no horizon, no Andes, no road. White going to grey going to white. The track to the world was somewhere under all that, and la Cabra, our one tracked hauler, sat in the garage with her batteries cold. The uplink had died sometime in the night. The little indicator I'd watched go from green to nothing was still nothing. We were a sealed jar on a white table, and the lid was screwed down tight.

I dressed in the dark, took one short pull from the flask in my boot-liner because my hands wanted it and because nobody was awake to count, and went to keep us all alive.

The galley smelled of instant coffee and the particular staleness of recycled air that's been around the loop too many times. Reinholt was already up, of course, holding court at the long table with the energy of a man performing a man who isn't worried. Our director, principal investigator, the name on the funding. He had his good fleece on, the one with the consortium's little eye-logo, and he was steering Dane Marsh the way you steer a drunk away from a window.

"—the discovery of the generation," Reinholt was saying. "We say it without melodrama because the data says it for us. We are looking at metabolic pathways no textbook has."

Dane had his camera up on its little gimbal, the red light steady, the way it was always steady. "And the commercial side," he said, mild as milk. "Halberd Bioventures. Their stake. People will want to know whether the science serves the discovery or serves the deal."

"We serve the work." Reinholt smiled with his whole face and none of his eyes. "The investment makes the work possible. That is not a conflict. That is oxygen."

He chose the word badly, here, where oxygen was a metered thing, but he didn't notice. Dane did. He let it sit a half-second, a documentarian's silence, and the red light kept recording it.

I logged that, too. Not on a terminal. In the small grid notebook I kept in my chest pocket, the one I trusted more than the BMS because paper doesn't get a software update at three in the morning and forget what it told you. Day 1. Storm in. Link down. R. managing the journalist. Tension re: money. I'm an engineer; I write down what's drifting before it drifts somewhere I can't follow.

Kit lifted a hand at me from the comms corner, gave me his nervous grin, the one with too many teeth. "Stationkeeper lives," he said, tapping a rhythm on his coffee mug, tap-tap-tappa-tap. "Tell me the internet's coming back. Tell me a lie if you have to."

"Internet's a lie at the best of times," I said. "Up here it's a rumour."

He laughed, finger-drumming, and went back to his racks. He was the only one of us who didn't look gut-punched by the morning headache. I'd noticed that the first week and filed it under lucky and then under odd and then stopped looking at it because looking at people too hard is how you start seeing things that aren't there. I'd learned that lesson the expensive way, two seasons ago, under a different supervisor's voice, in a flooding shaft, with a young man who didn't come back up. I don't look at people too hard anymore. I look at machines.

Which is why, by seven, I was on my knees in the water plant with a flashlight in my teeth, looking at a machine that was wrong.

The soft seal from yesterday — the one on the brine line's flange coupling that had gone spongy under my thumb when it had no business going anywhere — I'd told myself it was age, cold-flow, a bad batch of nitrile. Standard. Boring. The kind of failure that has a part number. I pulled it now and held it under the light and it was not boring at all.

The polymer was etched. Not cut, not torn, not crushed — etched, in a fine dendritic lace, like frost spreads on a window, like something microscopic had walked the surface and eaten a pattern into it. Branching. Almost pretty. I turned it in the beam and the lace caught the light all the way through, threadbare in places to nothing. I'd never seen a seal fail into lace. Seals don't have the imagination.

I went down the line. The next coupling, six metres on: the same. Spongy, and when I worked it free, the same threadwork chewed into the gasket face. And the harvester's intake gland, on the far wall, where the atmospheric water came in — third one. Three. Three is not a bad batch. Three in a line is a trend, and a trend on a station is a thing with a clock attached.

I bagged all three, labelled them in pencil, and went to find the only person who'd understand what I was holding.

Noor was in the biosecurity wing behind the inner door, the one with the gasket and the pressure differential and the rule about who goes through it. I knocked the polycarbonate. She came to the glass with her hair up and a smudge of something on her cheek and her usual look of a person three problems deep and happy there. I held the bags flat to the window.

She went still.

I've seen Noor excited — she hums, this tuneless contented buzz, when the work's going well. She wasn't humming. She put her gloved fingertip to the glass over the lace pattern and traced one branch of it, slow, and her mouth went thin.

"Where," she said. Through the glass it came flat. "Show me where these were."

"Brine flange. Harvester intake. The coupling by the day tank." I watched her face. "Noor. Talk to me like I fix things, not like I publish them. What am I looking at."

She didn't answer for a moment. She was looking at the lace the way you look at your own handwriting in a place you didn't expect to see it.

"It's the mat," she said finally. "The velvet. It — there's a class of extracellular enzyme it secretes. A solvent. In the brine it does this to organics, to certain polymers, given time and contact." She tapped the glass once. "This is the signature. This branching. It's how it cuts. Nothing else cuts like it."

"And the brine's in my lines," I said. "So the solvent's in my lines."

"So the solvent's in your seals." Her voice dropped. "Mara. It's loose in the building. In the joints. Every gasket the brine touches, every gland — it's eating the station from the inside and there is no hand on it. It's just biology. And it doesn't stop."

I knelt there a second with three little bags of lace and did the arithmetic an engineer does without wanting to. Number of wet seals on the station. Rate. The fact that Reinholt had stood in the galley an hour ago calling the velvet the discovery of the generation and not once the word corrosive. He knew what it did. He had to. And he'd built a press release on top of it like a man laying a rug over a hole.

"Does Reinholt know it does this," I said.

Noor looked at me through the glass, and the silence was the answer, and then she gave me a worse one. "He's known longer than I have," she said. "He's just been very careful about which version goes in which file."

I left her the bags. I did not feel better.

Brandt caught me in the walkway between lab and habitat, where the heated floor met the cold of the connecting tube and your breath went to fog. He had his clipboard, because of course he did; our safety lead conducted his fear through laminated checklists. He fell into step and dropped his voice under the wind.

"Reyes. I want a worst-case inventory. Private. You and me."

"I do those out loud," I said. "It's healthier."

"Not this one." He stopped walking. Up close his jaw was working at something. "Power, water, heat, air — give me the failure trees. How long each holds, what kills it, what kills us. No drama, no committee. I need to know the floor we're standing on." A beat. "Because I may have to make calls I don't have the full picture for."

"You're safety lead. You have more picture than anyone."

"I have a sealed case," he said, and then looked like a man who'd let a coin slip down a drain. "Contingency orders. From the consortium. I haven't opened them. I'm not supposed to until conditions meet a threshold." His eyes went past me, down the white tube to nothing. "I'd like to know the threshold's a long way off, is all. So give me the trees. By tonight."

"What's it called," I said. "Your sealed case."

He almost didn't. "Protocol Aurora," he said, like the words tasted off, and went, clipboard against his chest, into the habitat's warmth.

I wrote it down. Brandt — sealed consortium orders, unopened. "Protocol Aurora." Worst-case inventory wants it private. Why private. The pencil tip broke on the last word and I sharpened it with my thumbnail and finished the sentence because a thing unwritten is a thing you'll be tempted to un-remember.

The storm got worse through the afternoon — the wind found a new register, a flat shriek that meant the gusts were over a hundred now, lifting salt and throwing it at the modules so the walls hissed like fat in a pan. I did my trees. Power: forty hours on the generator before fuel logistics got interesting, less if a seal in the wrong place let the cold in. Water: the lace gave it a clock I didn't like. Air: the medbay's oxygen, finite, mattering. Heat: the one that killed by morning if you lost it. I drew them clean and I drew them honest and I trusted the paper.

By the time the galley filled for dinner I'd half-talked myself back to steady. Seven of us at the long table, and Reinholt saying we, and Lena reading everyone's pulse off their faces, and Beto telling the table the salar had her own opinions about people who drilled into her, and Dane's red light, always.

Seven. I counted twice because that's what I do.

Brandt didn't come to dinner. Brandt never missed a meal; the man treated calories like a checklist item. And when I went to the wall panel to ping the generator shed where he sometimes did his thinking, the carbon-monoxide readout there had been sitting at a flat, impossible zero all afternoon.