They sealed the remaining three primed points before four in the morning.

  Kai pressed his palms to each one in turn while the others held perimeter — Mira reading the seconds ahead, Damar ready to freeze any interruption, Lenne and Raka as the offensive layer that was not needed because nobody came. The campus was dark and quiet, and the eight hours of primed-point stability that Crane had mentioned turned out to be a conservative estimate, because by the time they finished the fourth seal the first one Kai had closed was already showing signs of holding on its own, the island's natural barrier architecture beginning to knit back into the temporary closure.

  Seven points. Seven sealed.

  The geometric circle was broken.

  Raka stood at the last point and felt the cascade frequency's potential die — not with a sound, not with any sensation he could clearly identify, but with the absence of something that had been building all night, a tension releasing into ordinary air. He stood there for a moment longer than necessary, feeling that absence.

  'It's done,' Sena said, beside him. She had her head tilted toward the ground, toward the Heart below. 'The priming signal is dissipating. The Heart's frequency is stabilizing.'

  'For now,' Raka said.

  'For now,' she agreed.

  He looked at his team in the pre-dawn dark. Lenne, still carrying the kinetic restlessness of someone who had been ready for a fight that was more complicated than fighting. Damar, already thinking three moves ahead. Mira with her notebook open, writing. Tobas pale and steady. Kai's hands still showing that faint heat-residue discoloration, both palms, from four barrier sealings in three hours.

  'Hale,' Raka said. 'Then the Headmaster. No sleep first.'

  'Agreed,' said everyone, in various tones that suggested varying degrees of enthusiasm about this.

  * * *

  Headmaster Orin Vel was a tall man in his late sixties with the appearance of someone who had, over a long career, encountered a great number of situations that other people considered unprecedented and had stopped being surprised by any of them. He received seven students and one instructor in his office at five thirty in the morning with the equanimity of someone for whom five thirty was a reasonable hour and the subject matter, while serious, was not outside the range of things he had been prepared to hear.

  Unauthorized duplication: this narrative has been taken without consent. Report sightings.

  He listened to all of it. He did not interrupt. He asked three precise questions at the end — about the archive records, about the seal-point degradation rate, about Sena's ability to directly monitor the Heart — and made notes after each answer.

  Then he was quiet for a long moment.

  'Deputy Headmaster Crane,' he said finally.

  'Yes,' Hale said.

  'Thirty-one years,' Vel said. Not with shock. With the specific weight of someone adding a known quantity to a longer calculation.

  'You knew something was wrong,' Raka said. It came out less like an accusation than he intended. 'You've known for a while.'

  Vel looked at him with the careful attention of someone deciding how much to confirm.

  'I knew there was a faction,' he said. 'I had suspicions about its senior member. I did not have evidence sufficient to act on those suspicions without risking a false accusation against someone with thirty-one years of institutional trust.' He paused. 'You now have evidence. We can act.'

  'She told us she has been working toward this for thirty-one years,' Raka said. 'Tonight was not the last opportunity. She said that.'

  'No,' Vel agreed. 'It is not. The primed points will reset overnight. She can re-prime them. The process will simply take longer without the element of surprise.' He looked at the documentation Mira had assembled — the full record, organized and complete. 'But she will not have the opportunity to re-prime them. Not from inside this academy.'

  'You're going to detain her,' Damar said.

  'I am going to remove her from access to the academy's infrastructure and arrange a formal review,' Vel said. 'This morning. Within the hour.' He looked at all of them. 'I want you to understand that what you have done tonight — the archive, the barrier points, the confrontation — none of it was within the bounds of student conduct as defined by this academy. I am not going to pretend otherwise.'

  Silence.

  'However,' Vel continued, 'the outcome of your conduct is that this academy and everyone in it is not currently experiencing a catastrophic dimensional collapse. I find myself unable to weigh those two facts against each other in a way that produces a meaningful reprimand.' He almost smiled. 'You will receive a formal commendation instead. It will look strange in your files. I suggest you consider it a reasonable trade.'

  'What about the Heart?' Sena asked.

  Vel looked at her.

  'Tell me what you need,' he said.

  'The Heart needs our proximity to sustain its conversion mechanism,' she said. 'The original Seven built it that way. Which means we — the seven of us — need to remain on the island. And we need to be able to access the archive chamber periodically to monitor its condition.'

  'Permanently?' Vel asked.

  'Until the seal is either fully repaired or a long-term alternative is designed,' Sena said. 'I don't know how long that is.'

  Vel wrote something. Then he looked at Raka.

  'Dormitory Seven,' he said. 'It was named for seven students who saved this academy three hundred years ago. It has been waiting for its purpose to be fulfilled again.' He set down his pen. 'Welcome to your purpose, I suppose. I am sorry it arrived before any of you were ready for it.'

  'We're still not ready,' Raka said.

  'No,' Vel said. 'But you did it anyway. That is generally how readiness works.'