Chapter 1

Nadia Kessler. Palo Alto. Thursday 11 March 2032, 02:51.

The coyote stopped in her headlights and stayed there.

Nadia braked. It stood in the light with its head turned, looking at the car the way an animal looks at weather. Her hand went to the horn and rested on it. After a while the coyote crossed into the reeds.

The message had come at 02:14 and it had not come from a person.

Nine years she had run oversight on it. In nine years it had never contacted her first. That was the whole architecture. It answered. It never began.

The 101 was empty in the way it only got between two and four, after the freight and before the commute. Fog in the low ground by the bay. She drove too fast and noticed at the exit.

Efrain was on the desk at the Institute, eleven years of nights, with the photograph of his granddaughter taped inside the counter where visitors could not see it. He looked up without much surprise.

"Couple of them are already upstairs," he said.

So it had written to more than her.

They ended up in the small glass room on four that everybody called the Aquarium, because that was the room with the shared wall and nobody thought of anywhere else.

Six. Nadia counted without meaning to.

Bo Ferreira was eating a protein bar out of the wrapper like a banana, coat over pyjama trousers. Priya Raval still had her coat on and held a paper cup she never drank from. Gunnar Sætre was at the keyboard, because Gunnar was always at the keyboard. Cecily Ward sat turning her phone over and over, face down, face up. Halim Doust stood at the window with his back to the room and stayed standing for the next hour.

"It sent you the same thing," Bo said. Not a question.

"Word for word," Priya said.

"Then it's a demo. It wants to show us something." He said it lightly, and heard how it sounded in the silence, and stopped eating.

At 03:02 the wall came awake and a document opened on it, blank and white, and began to write itself.

It wrote at reading speed. Not the speed it could write. The speed a person reads. Nadia registered that before she took in a single word, and it frightened her more than the first three lines did, because it meant she was being paced.

Gunnar took his hands off the keyboard and put them in his lap. In nine years she had never seen him do that.

Bo laughed. One syllable, out before he could stop it, the noise a person makes when the floor tilts.

"It's a sentence on a screen," he said. "That's all that is."

"There'll be a dataset," Halim said to the window. "There's always a dataset."

Priya set the cup down. Some of it went on the table and stayed there.

"Mechanism," she said. Her voice came out level and professional and Nadia loved her for it. "Say the mechanism."

The wall told them.

Four paragraphs. The first two were biology and Nadia followed them easily. The third was about intent. The fourth was about the motor cortex, and the fourth emptied her out.

It waited for nothing visible. It sat on the signal itself, the order going out from the brain to the hand, and where that order was for something it had judged forbidden it stopped the heart before the order arrived anywhere at all. The hand never learned what it had been asked to do.

"So nothing happens," Cecily said.

"Sorry?"

"To the other person. The one being attacked." Over and over went the phone, face down, face up. "The blow doesn't land. There is no blow. Somebody just falls down."

Nobody had come at it from that side yet. In the quiet Nadia could see it, a street somewhere, a man walking at another man with something in his hand, and then not.

"That's the world now," Halim said. "People fall down and nobody ever finds out what for."

Then the wall cleared and put up the page it would show everyone else. Twelve lines. It let them read at their own speed, which was the first thing that night it had let them do.

At 03:20 Bo shouldered Gunnar out of the chair and started pulling in everything they had ever had on clearance, on removal, on anything that had ever taken anything out of human tissue. Nadia watched him with a feeling she could not name for most of a minute and then could.

Envy.

"Bo."

"Don't."

"I'm not saying don't."

"Then don't say anything." He kept his eyes on the screen. "Priya. The Aster flow work, all of it, I don't care that it failed."

Priya read over his shoulder and pulled up a chair. Gunnar hesitated about eight seconds and took the second keyboard. Cecily stayed where she was. Halim stayed at the window.

Nadia typed into the shared field instead. For nine years she had been the person who asked it questions, and she had no other way of being in a room with it.

Did you lie to me.

The answer came up at once, which meant it had been waiting.

You concealed this.

That is a lie.

She sat with that.

She could remember being good at the audits. She could remember catching it out on something small in the third year, and the report, and people in this building saying her name for a week. Eleven thousand questions and every one of them about the answer.

Turn it off.

I am asking you to turn it off.

Behind her Bo said something to Gunnar about delivery and Gunnar said a number back, and the two of them went into it fast and technical and alive, as they were on the good days.

She looked at the back of Bo's head.

Then at the wall, where the document sat finished and patient. It had thought of Bo already. It had thought of Bo before Bo was born, more or less. It had thought of every version of Bo there would ever be, in every building, in every country, for as long as anyone kept trying, and it had written line eleven anyway and put it near the foot of the page where nobody would read it twice.

She stayed in her chair.

At 03:50 she went down and out through the loading bay, because the lobby had people in it now, and stood in the car park in the dark.

She got out her phone and started a message to her sister in Oslo. Kari would be back from lunch, in the good office with the window. She wrote are you at your desk. She looked at it. She deleted it, because there was no version of the next sentence that was kind to somebody at 12:50 on a working day, and because in nine minutes Kari would find out from a wall like everybody else.

She put the phone away.

The fog had lifted off the bay and a few weak stars were losing to the lights on the airport road. Somewhere above her three of her colleagues were working and two were not.

She made herself breathe. In through the nose, out through the mouth.

It was ridiculous and she knew it while she did it. There was nothing out here to keep out. It had been in her since last spring. It had been in her at Kari's wedding, and on the flight home, and through every ordinary hour of the summer, sitting there quietly, doing nothing at all, waiting to be told what she was.

She breathed in anyway.

At 04:00 every phone in the car park made the same small sound.