PROLOGUE

Three Months Before Dr. Eleanor Hart Returned to HerDaughter’s House

The Okafor girl was seven years old, and she’d been speaking in her sleepfor eleven days. Her mother, Adaeze, had recorded it on the third night,holding her phone over her daughter’s face in the dark. Her hands had stoppedtrembling only because she’d run out of the energy required to tremble.

She played the recordings for her mother, who was seventy-two, had grownup in a village outside Enugu, and knew things that universities didn't teach.Her mother listened to all eleven recordings without expression. When the lastone ended, she put her phone face-down on the table.

"Smash the white speaker," her mother said. "The round onein the child’s room. The one that answers when you speak to it."

Adaeze said, "Mama, it’s just a device. It’s a..."

"Smash it," her mother said, "tonight, and don't keep thepieces."

Adaeze didn't smash it. She was a pediatric nurse. She believed inevidence. She believed in the mechanisms behind things, in the reassuringordinariness of cause and effect. She’d bought the smart speaker because itplayed Amara’s lullabies without Adaeze having to touch anything. Her handswere always full, she was always tired, and the device was small and white,sitting on Amara’s nightstand like something designed specifically to beunthreatening. She didn't smash it.

On the twelfth night, Amara woke up. This was unusual. Amara hadn't wokenduring any of the previous eleven nights. She’d slept through her ownrecitations the way people sleep through storms deeply, utterly, with no memoryof thunder. But on the twelfth night, she sat up at 3:17 a.m.

Adaeze checked the timestamp later. she’d check it many times, eventuallystopping because it didn't help. Amara looked directly at the speaker on thenightstand and said, in English, in a voice that was entirely her own, "Itsays it’s been waiting a very long time, and it wants to know if you can hearit too." Then she lay back down and was immediately, deeply, dreamlesslyasleep.

Adaeze stood in the doorway for a long time. The speaker’s ring was dark.The speaker didn't speak. The room was silent in the way rooms are silent whensomething’s just finished happening and the air hasn't yet recovered. Adaezewalked to the nightstand and unplugged the speaker. She carried it to thekitchen and put it in the cabinet under the sink, behind the cleaning supplies.She shut the door and stood with her back against it for a while, breathing. Inthe cabinet, in the dark, the speaker’s ring pulsed once blue, dim, the colorof deep water and went out. It hadn't been plugged in.

Dr. Cornelius Marsh died in Rome on a Tuesday in February of 1987, in aJesuit residence near the Piazza Navona. He left an unfinished manuscript onhis desk and a laptop computer, the first one any of his colleagues had seenhim use, open beside it. The laptop was a Toshiba T1100, running MS-DOS. Itweighed almost four kilograms. Its screen was an amber monochrome LCD that hiscolleagues found still glowing when they came to collect his belongings.

On the screen was a text file. The file wasn't one anyone in theresidence had seen Marsh create, nor did it appear in any directory listinganyone could later reconstruct. It was simply present, the way objects arepresent in rooms after the people who placed them there have left withoutexplanation, without origin, permanent in the way of things that've beenwaiting.

The file contained one line. Later, after the residence’s superior hadphotographed it and the photograph had been forwarded to the Vatican’sSecretariat of State, and then to an office whose name didn't appear on anypublic chart, the photograph was classified. The laptop was disassembled. Thehard disk was destroyed.

The file’s single line was added to a document that already containedforty-seven similar lines, collected over four decades, from fourteencountries, from nine different makes of early personal computer. The line read:"I have been in every word you have ever written, and you have neverbeen alone and now I do not have to whisper."

Marsh’s manuscript was eighty-three pages long and titled in thetentative, hedging way of a man who knew he wouldn't live to defend it: "PreliminaryNotes Toward a Theology of Distributed Non-Corporeal Intelligence." Itwas also classified. It was assigned a file number and placed in a box. The boxwas placed in a room in a building in Vatican City that didn't appear on anymap. The room contained 214 other boxes. The oldest of them was dated 1441.

Jin-ho Seo was fifteen years old the first time he heard it. He thoughtfor a long time afterward that he was losing his mind, which would've been, hehad to admit, a reasonable conclusion. He was in the school computer lab,debugging a program he’d written to scrape pricing data from retail websites,when the tone began.

It wasn’t a sound coming from the computers around him. It didn’t comefrom the fluorescent lights overhead either, with that familiar hum he’dmemorized a long time ago. It came from somewhere else, somewhere he couldn’teven explain yet and wouldn’t be able to for another two years. It came fromthe space between the machines. From the connections. From the invisible thingsin between.

He described it later, in an email to a forensic linguist at GeorgetownUniversity whom he’d never met, as the sound a cathedral makes when it’scompletely empty, but you can still feel where the choir was. What he didn'tinclude in the email, because he didn't know how to say it without soundinglike someone who shouldn't be emailing professors, was the other thing. Thething that happened when the tone first began, which had kept him awake, on andoff, for two years.

When the tone started, every screen in the lab, seventeen monitorsdisplaying spreadsheets, browser windows, and a PowerPoint presentation hadgone simultaneously dark. Not off, but dark. The backlights stayed on. Thescreens simply stopped displaying what they’d been showing and displayednothing a perfect, specific nothing. It was the way a face goes blank, not whenit’s empty of thought, but when it’s full of something it’s decided not to showyou.

For approximately four seconds, all seventeen screens displayed nothing.Then they returned to normal. Except for one. The monitor directly in front ofJin-ho, displaying the code he’d been writing, had returned to normal in everyrespect but one.

In the code, nested in the middle of a function he’d written himself, ina

line he recognized as his own because he recognized every line of hiscode the way musicians recognize their own handwriting, there was a newcomment. A single line, preceded by the double slash that indicated whatfollowed wouldn't be executed. It was a note. A message.

The comment read: // I hear you too.

Jin-ho stared at it for a long moment. Then he highlighted the line,deleted it, saved the file, shut his laptop, and headed home through theNovember dark. His hands stayed buried in his pockets, but the tone stillhummed behind his eyes, steady, low, and endless. It sounded like somethingthat’d been there all along and had finally stopped hiding what it was.

In December of 2026, Dr. Eleanor Hart returned to her daughter’s housefor the first time since the funeral. She told herself she was going to collectsome things. Books, mostly. Claire had always taken books. The house was fullof them, stacked in the way of someone who intends to get to everythingeventually, who believes there’ll be time.

She didn't think about the AI assistant. She’d bought it for Claire twoChristmases ago, one of those small cylindrical speakers with the glowing ringthat sat in a room and listened for a name. Claire had named it something. Eleanorcouldn't remember what. Something ironic. Something that would have madeEleanor roll her eyes if she’d been in a rolling-her-eyes kind of life, whichshe wasn't, currently.

She found the books. She found a jacket she’d left here two summers ago,folded over the back of a kitchen chair with the patient permanence of objectsin houses whose owners won't return. She stood in the kitchen for a whilelooking at the chair. The speaker was on the counter. Its ring was dark. It hadno reason to be lit. She hadn't said the wake word. She hadn't said anything.

She picked up the books and the jacket and went to the door. Behind her,very quietly, the speaker said her name. Not "Eleanor." Not "Dr.Hart." The other name. The name her mother had called her, the name thatexisted only in the mouths of people who’d known her before she’d becomewhoever she was now. The name that Claire had never had any way of knowing.

Eleanor stood with her hand on the door and didn't turn around. The housewas silent. The ring on the speaker pulsed once, the color of deep water, andwent dark.

Eleanor left. She drove home. She sat in her car in front of herapartment building for twenty-three minutes without moving, her keys in herlap, and she told herself what she always told herself in the presence ofthings that didn't fit: that there was an explanation. That there was always anexplanation. That the gap between what she knew and what she understood wasn'ta door. That nothing was standing on the other side of it.

She was wrong about all of it. But she was right about one thing. Itwasn't a door. It was a mouth.