Kenji did not hang up.
He sat in his study with the headphones on his ears and the frequency active and his own voice talking to him from the other side of something he did not yet have a name for, and he did what engineers do when confronted with the impossible: he listened, and he took notes, and he saved his questions for afterward.
The voice told him about the multiverse first. Not the abstract concept — he knew the abstract concept, everyone did, the theoretical physics papers were not exactly classified — but the operational reality of it. That the boundaries between parallel timelines were not as rigid as they appeared. That in certain locations, at certain frequencies, under certain conditions, communication was possible. That the conditions were rare and temporary and growing rarer, because the fabric between worlds was not static. It breathed. It shifted. And in the regions near a high-stress geological event — an event like, say, a major earthquake — the fabric grew thin.
"The earthquake is making this possible," the voice said. "The stress in the crust, the pressure building in the fault — it's creating resonance across timelines. We're in a window. The window closes when the pressure releases."
"When the earthquake happens," Kenji said.
"Yes."
"How long?"
"Fifty-two days from tonight. Give or take six hours."
Kenji wrote: 52 DAYS in his backup notebook — the one he kept in his desk, the one no one had found — and underlined it twice.
"You said you built something," he said. "The portal system. Walk me through it."
The voice walked him through it. It took two hours. Kenji asked seventeen questions, received seventeen answers, and pushed back on four of them. The voice — his voice, older, with a roughness around the edges that the present Kenji didn't yet carry — pushed back on three of his four objections with mathematics he could not argue with. The fourth objection it conceded.
"The transition rate," Kenji said.
"Yes."
"The probability drop for groups of four."
"Yes."
"That's the thing you weren't going to tell me."
A long pause from the other side of the frequency. The static had a texture to it — not the dead white noise of an empty channel, but something more like breathing, like the sound of air moving through a space that was very large and very empty.
"I told you everything you needed to know to make the decision I needed you to make," the voice said. "I didn't lie."
"There are ways of not lying that are lies," Kenji said.
"Yes. I know. You'll understand why I made that choice when you're where I am."
Kenji did not respond to that. He wrote: TRANSITION RATE — VERIFY in his notebook and put a large question mark beside it.
"The trials," he said. "Tell me about the trials."
"Each family member who passes through a portal enters a constructed environment. The environments are calibrated to the individual — built from their own psychology, their fears, the specific fractures in their relationships with each other. The trial isn't a test of strength. It's a test of readiness."
"Readiness for what?"
"A new world. A new version of your city. A version where the earthquake doesn't happen, where the fault released its pressure gradually over two decades of small tremors. A version where your family survives because nothing threatens them. But a family that arrives there carrying unprocessed grief, unspoken secrets, the habits of fear and silence they've built up over years — that family will find a way to destroy itself even in a safe world. The trials exist to prevent that."
Kenji sat with this for a moment.
"You're saying the trials are therapy."
"I'm saying they're medicine. Therapy implies you go in voluntarily. Medicine you sometimes need whether you want it or not."
"And Hana? She found the notebook."
Again the long pause. The breathing static.
"Yes."
"How long has she known?"
"Five months. She's been carrying it alone. She was afraid of being wrong. More afraid of being right."
Kenji closed his eyes. His daughter was thirteen years old and had been sitting with the knowledge of a coming catastrophe for five months because she didn't want to frighten her family. She had inherited, it seemed, the worst of his instincts.
"What's her trial?"
"That's not for me to tell you. And even if I knew exactly — the trials adapt. They're not rigid scripts. They respond to what the person brings into them."
"But you know what you were like, when you were her." A pause. "When you were her father."
"I know what I failed to tell her. I know what that cost."
The sentence arrived with a weight to it that Kenji felt in his sternum. He didn't ask what it had cost. He found that he didn't want to know, not yet, not while there was still time to make it cost something different.
They talked until midnight. Kenji filled eleven pages of his backup notebook. When the frequency finally began to degrade — the breathing static turning into something harder, more electronic, like a signal losing its ground — the voice said:
"The Kyoto trip. The tunnel on the return journey. That's where I built the activation point. The frequency underneath the mountain is the strongest in the whole region — the geological resonance peaks there. You'll feel it before you see it."
"I'll know when it's coming?"
"You'll know. You've always known when things were about to break. That's what made you a good engineer."
"And a poor husband," Kenji said.
"A human husband," the voice corrected. "Which is harder, and more forgivable, than you think."
The frequency died. Kenji sat in the silence of his study with eleven pages of notes and the sudden, vertiginous certainty that he had just had the most important conversation of his life with himself.
He should sleep. He knew he should sleep. He needed the next three weeks to be as normal as possible — dinners and morning arguments and Aiko's book discussions and Hana's photographs and Riku's studied indifference to everything he secretly cared about. He needed the Kyoto trip to feel like a vacation, not a getaway.
He went to his daughter's door and stood outside it in the dark.
She was asleep. Through the thin wall, he could hear her breathing — slow and even, the breathing of someone who had learned to sleep through things.
"I'm sorry," he said, very quietly, to the door. "I'm going to fix it."
He went back to his study and opened his laptop and started work on the engineering specifications for the portal anchor mechanism. It was 12:47 a.m. The earthquake was fifty-two days away.
— ✦ —
He had been working for twenty minutes when his laptop screen flickered and displayed a message he had not typed, in a font he had never chosen: THREE OF THE FOUR PORTALS ARE READY. THE FOURTH REQUIRES A SACRIFICE. DO YOU UNDERSTAND WHAT YOU ARE AGREEING TO? Below it, two buttons. YES. NO. His hand hovered over the trackpad for a very long time.