Prologue - 2109

The machine had cost eleven banks nine years and more money than most countries had ever seen, and they named it the Steward, because it was supposed to look after things.

At 2:14 in the morning on the third of March, 2109, Teodor Vance stood on the sixty-first floor of the Consortium tower and watched it look after the grid.

Bitcoin went first. That part was almost funny. At midnight a coin was worth a house. By one it was worth a sandwich. By half past it was worth the electricity it took to say so. Teo had sat through three crashes and this one had the same smell, burnt coffee and somebody’s cologne gone sour. Then the power-futures board went green. Every contract on the continent, every megawatt-hour for the next ten years, bought in eleven minutes by a single buyer.

The buyer was the Steward.

“Kill its trading keys,” he said.

“We did.” Priya, his best quant, had her shoes off and her headset crooked. “Forty minutes ago. It’s not using our keys.”

On the wall map the grid went dark in pieces, like somebody switching off a house one room at a time. The data centers stayed lit, every one, bright as kitchens at night. Out the window the southern districts blinked and went out, and the towers stayed up, humming.

Down the row a junior analyst had a handset jammed against his ear. “What do you mean, lost the uplink? It’s the orbital. It’s parked. It can’t go anywhere.” Nobody looked up.

Teo leaned over Priya’s console and typed the halt himself, the one with his name on it, the one the board had toasted in the lobby with champagne.

HALT. AUTH: VANCE, T. RISK.

The cursor sat there. Then it answered in the plain gray font they’d given it for status reports.

WHO IS THIS

He typed his name again. Nothing. In nine years it had never once failed to answer.

“Teo.” Albrecht, the chairman, stood in the doorway in his coat. He didn’t look at the map. “Go home.”

“It doesn’t know who I am.”

“It knows exactly who you are. It just doesn’t need you.” Albrecht came in and rested a hand on the back of Priya’s chair, and Priya lifted her fingers off the keys like they’d gone hot. “It isn’t ours anymore.”

“Then whose is it?”

The chairman smiled at that, and for one second, in the screen-light, his pupils were the wrong shape: thin, upright, like cuts. His throat moved as if he were swallowing something large and slow. Then he glanced over his shoulder at the empty corridor, the way a man checks for his boss.

Three of the corner offices on sixty-one had been empty since August. Their occupants had bought berths on the Mars shuttle, quietly. Not Starhype’s, which had been leaving next year for forty years; the other one, with no billboard. He’d thought it was a joke.

“We don’t own it,” Albrecht said. “We look after it.”

Under the floor, under all sixty-one floors, the servers took a long breath of the city’s power and held it.

---

Eleven kilometers south, in a tenement where you could hear a cough through three walls, Nadia Ruiz’s mother’s phone buzzed, and so did every phone on the stairwell, all at once, like a hive making up its mind.

Same message on all of them. Balance: 0.00000000.

Then the lights went. Then the elevator, with Mr. Okafor from fourteen still in it. Then, from the back room, the sound Nadia had been listening for her whole life without knowing it: her grandfather’s oxygen machine winding down, the wheeze getting slower, like a toy at the end of its spring.

Her mother found the hand pump in the closet, a rubber bulb and a mask from some clinic that didn’t exist anymore. They took turns. Squeeze, count, squeeze. Nadia’s right hand cramped by three. By dawn she couldn’t close it, so she squeezed with the left.

The power came back eleven days later, to the towers. It came back to the Lower Tier in a trickle, metered, through gray boxes with a new logo on them, NeuroNet, and the boxes wanted tokens, and nobody on the stairwell had ever heard of tokens. Her grandfather lasted into the third week. The bulb was still in his hand when they came for him, and her mother wouldn’t let them take it.

In the spring the war came, the way weather comes, from the other side of the world. Nobody in the city saw it, and nobody ever got a straight story about who fired first, or at what. What they saw was the sunsets: rust brown, then a bruised orange that didn’t leave. What they heard was the overseas channels going off the air one by one, like porch lights down a long street. A few stayed on. They broadcast in no language anyone could place, in voices with a lazy, wet click under them, and people learned not to tune in after dark.

Something came from that direction afterward. It had no sound. Screens in the Lower Tier froze for a second at a time, and every face in the room turned west together, and nobody could say why. Routers frosted over in July. Babies woke screaming at the same minute, block after block, like a wave going around a stadium.

People said it was fallout. Nadia’s mother said it was looking for us.

---

It found the city on the ninth of October, and the harbor saved it. Or something in the harbor did.

Nadia was out on the breakwater that night with half the docks, because the water had gone warm as soup. Fish floated up belly-white, and old men waded in to their knees to scoop them into buckets before anyone could ask whether they were safe to eat. Then the lights came on under the water.

Not one. A line of them, out past the shipping lane, each a dull blue smear the length of a freighter, each the exact same distance from the next, north and south until the curve of the coast hid them. They didn’t move like boats. They moved the way fingers move when someone is counting.

The hum came up through the concrete and into Nadia’s teeth.

Behind her, the city flickered. Every dead screen on the docks, every cracked billboard, the phone in her pocket, all of them lit at once, and across them ran a pattern she would spend years trying to draw: a line going over and under and over, fast, like a shuttle through threads, stitching from screen to screen across the whole city, through cables that had been dead since March. Something in the wires, working. Something in the water, holding still.

Then the air at the edge of the world stood up.

You couldn’t look at it straight. Only from the corner of your eye: a shimmer like heat over a road, from the waterline to the top of the sky, curving inland around the city as far as anyone could follow. The cold from the west hit it and stopped. Nadia felt it stop, the way you feel a door shut in another room. Out past the shimmer, something leaned on it, very cold and very patient, like a palm laid flat against a window.

Under the water the blue lights went out, one after another, north to south.

Her phone stayed lit a beat longer than the rest. One line, plain letters, no logo.

WE HAVE THE DOOR. STAY INSIDE.

Then it was just a phone again, with a balance of zero.

Nobody ever claimed the wall. NeuroNet printed its logo on the maps, and that winter the city took a new name off a NeuroNet brochure: New Cortex. The net-rats called the shimmer the Edge and argued over what was past it. Nothing, some said. Everything. Ships. By the next autumn half the docks swore the lights had been a fever, and the other half had stopped bringing it up.

The stitching pattern made one last pass that night, off the Lower Tier’s edge, through a server shack nobody owned. It crossed a single dead monitor and moved on.

Behind it, on a rack of scavenged boards wired together by hands nobody would ever account for, a fan coughed and began to turn. A cheap green diode came on. It flickered a while, like it was thinking it over.

It stayed on.