The assessment she ran on Theron the next morning confirmed what she had feared.

He was at Stage Two of cumulative exposure — not the acute crisis kind, but the sustained kind, the kind that had been building for weeks inside a body that had not been designed for this level of ambient Starfall energy over this long a period. The indicators were clear in the thread work: retrieval delays increasing, the associative pathways between certain categories of memory slowing, the specific early signs of what would become, if untreated, a significant and irreversible loss.

She went to Caelan immediately.

He received the report without interrupting, his face in the operational mode. When she finished he was quiet for the moment of processing.

“Timeline,” he said.

“Two days at current exposure levels before the delays become functionally significant. Less if the ambient energy increases further.”

“Can he be treated here?”

“Not adequately. He needs to be out of the active zone. The treatment I can provide in the field is supportive, not corrective. To stop the progression he needs to be away from the source.”

Another pause. “Then he goes tomorrow,” Caelan said. “With a two-person escort. I’ll send Mira with him — she needs to be out of the active zone as well.”

She had been expecting this and it was still the right call. “Yes,” she said. “That’s right.”

He went to find Theron.

She did not follow. This was a conversation between the two of them, between a captain and his deputy, between people whose understanding of each other went back years before she had entered either of their lives. She would see Theron before he left in the morning. She did not need to be there for the conversation that came first.

She was writing in the journal when Caelan came back. His face had the quality she associated with having done a difficult thing correctly: not satisfied, not at ease, but settled. The face of someone who had done what was required.

“He understood,” he said.

“He would,” she said. “He’s a good soldier. He knows when the mission requires something he doesn’t like.”

“He didn’t want to go.”

“No. But he went.” She looked at him. “You used his name. I heard you. Not Vask, not Deputy. His name.”

A pause. “Some conversations require it,” he said.

She nodded. Some conversations did. She wrote that evening: *Theron is leaving tomorrow. He called him by his name when he told him. Some forms of care don’t have a professional register and he knows it.*

*The unit is smaller now. Three soldiers remain, plus the two of us. It is enough. It is exactly what it needs to be.*

The work at the Sink had developed its own grammar by now.

She understood this in the way you understood the grammar of a language you had been living inside for long enough that you stopped consciously translating: not as rules but as the natural shape of how things unfolded here. Mornings were for the systematic documentation work, the careful methodical advancement of the record. Afternoons were for the more variable tasks — the atmospheric extraction sessions, the analysis of what the documentation had revealed, the planning conversations she and Caelan had in the machine’s outer chamber where the ambient energy was low enough to think clearly. Evenings were for the journal and for the fire and for the quality of silence they had built together over weeks of sitting in the same direction.

She was aware that when this was over — when the machine’s conversion was complete and they had done what they had come to do — she would be leaving a place she had not expected to become anything other than a dangerous operational environment and had somehow allowed to become something else.

Not home, exactly. But the location of a version of herself she was not fully willing to leave behind.

Caelan was part of what she was not willing to leave behind. This was not a complicated observation; she had been making it in various forms for weeks and it had become one of the clearest things she knew. She was not uncertain about it. She was only uncertain about the timing.

The timing, she had decided, was not yet. There was still work to do. There were still decisions to make and information to find and the conversion itself to execute. She would not impose a different conversation on the space that was currently occupied by that work.

But she was keeping careful records. She would know when the time came.

She wrote that evening: *Still working. Still building toward the threshold. Everything is in place except the methodology for the transition. Tomorrow I will find it or the day after. My father left it here. I will find it.*

*His heartbeat tonight is the natural kind. The camp is quiet. The Star Veins are running.*

*Write it down. Trust the record. The record will be there when you need it.*

The afternoon settled into its particular rhythm.

She had developed a method for the days at the Sink that balanced the work requiring her full technical attention with the work that could absorb a kind of broader awareness. Documentation sessions in the mornings, when her concentration was sharpest and the machine’s energy cycle was in a lower phase. Analysis in the early afternoon, building the picture from what the documentation revealed. Late afternoon for the conversations that the analysis prompted, the ones where she and Caelan worked through the implications together.

Today the late afternoon conversation had moved into territory she had been circling for several days without landing directly in it.

“The conversion,” she said. “When we do it. The machine’s light will go out briefly. The transition period between the memory harvest system shutting down and the star energy input coming fully online.”

“How briefly?”

“I don’t know exactly. My father’s notes suggest it’s a matter of hours, not days. But hours of darkness in Lunethar will be noticed. It hasn’t been dark in the city in recorded history.”

“People will be afraid,” he said.

“Yes. And then the light will come back, running on a different fuel, and nothing will look different from the outside. But everything will be different from the inside.” She paused. “The Synod will know immediately. They will know the machine has been changed. They will know it was us.”

“Yes,” he said. He did not seem troubled by this. She found she was not troubled by it either. They had accepted the consequences of the direction they were moving in long before they had named them explicitly. The naming now was simply completing the acknowledgment.

“We’ll need to move fast after the conversion,” she said. “Get back to Lunethar before the Synod can decide how to respond. With Maren already in position and the evidence we’re bringing back, there’s a case to be made. A strong one. But it requires being there to make it.”

“One and a half days back to the supply road,” he said. “Two more to Lunethar at pace. Three days from the conversion to the city.”

“Three days is manageable,” she said.

“Yes.” He looked at her. “You’ve been planning this part longer than you’ve told me.”

She met his gaze. “Since the Synod told me the mission was to assess and report. I’ve been planning the return journey since I understood what we were actually here to do.”

He held her gaze with the full look and then said, with the specific quality she had come to identify as his version of appreciation: “Good.”

She wrote that evening: *Three days from conversion to Lunethar. The plan is complete except for the execution. We have the methodology. We have the evidence. We have each other.*

*That last part sounds simple and is not simple at all. It is in fact the most significant thing on the list.*

*His heartbeat is the natural-steady kind tonight. Mine, I believe, is also settling toward it. We are ready. We have been ready for some time.*

The evening fire was small, adequate for warmth but not for light, and the Star Veins above were doing the work that fire couldn’t: filling the camp with the diffuse silver that had become, over the weeks, so familiar that she barely noticed it as light anymore and simply noticed it as the quality of here.

She was thinking about what came after.

Not the Synod. Not the case to be made. Those were real concerns and she had plans for them and the plans were good. She was thinking about after the plans: the aftermath of aftermath, the state of things once the machine was changed and the evidence was presented and the initial crisis was resolved. The long after.

She was in Lunethar with a three-year research grant that was his. She was a Starbinder who now understood what Starbinding had been funding, who would need to reconstruct her relationship to her profession entirely. She was a person who had spent twelve years losing memories in a process that was now going to stop, which meant she would stop losing things in the way she had been losing them, which meant the journal would need to change its purpose.

She thought about all of this without finding it frightening. What she found was something that felt like anticipation, which was different from what she had expected to find.

She thought about his hand over hers on the rock ledge. She thought about the lullaby. She thought about thirty years of her father’s work organized in a machine beneath the northern ice, left for her to find.

She thought: I have been finding things all my life. I am good at finding things. What I find next will be worth finding.

Caelan sat down beside her at the fire. Not across, beside, the distance they had arrived at over weeks that was neither professional nor personal but its own specific thing.

“You’re thinking about after,” he said.

She looked at him. “Yes.”

“So am I.”

They sat with that for a while, both of them thinking about after. The fire was small. The Star Veins ran above them. His heartbeat through the thread was the kind that was not steady because nothing was being managed, just present.

She wrote: *We are both thinking about after. We have not yet fully compared notes on what we are thinking. We will. The right moment is coming and I am not in a hurry, because what is waiting on the other side of the right moment is worth waiting for.*

*Tomorrow: the third diagnostic. The day after: the threshold.*

*I am ready. We are ready.*

*Write it down. Trust the record. Trust what is built.*

The next morning she ran the first diagnostic from her father’s protocol.

The diagnostic was designed to confirm that the star energy input channels were clear and able to receive, that the machine’s conversion architecture was intact, and that the Anchor Vessel’s interface was functioning at the level required. It was the kind of check that a good engineer built into a process at multiple points: not because they distrusted the design, but because trust in design was strengthened by verification rather than weakened by it.

She ran it carefully and methodically, Caelan present as the anchor at the input points he was designed to anchor. The diagnostic took two hours. Everything it checked came back clean.

She noted the results in the field journal and told him: “First pass complete. Two more.”

“Two more,” he confirmed.

She thought about her father writing the diagnostic protocol. About the care that had gone into building a process specifically for this moment, specifically for someone he had never met who would be standing in the machine with the person she was standing with. About the confidence required to build for a future you would not be present for.

She had that confidence now. She had been building it across the weeks of this journey, each piece of evidence adding to it, each correct call confirmed, each thing she had trusted holding when she put weight on it.

She trusted the protocol. She trusted Caelan. She trusted herself.

The remaining diagnostics would confirm what she already knew: they were ready.

She wrote in the journal: *First diagnostic complete. Clean. Two more, and then the threshold. My father built this. Dorian Drost built this. They trusted us with it.*

*I will not fail this trust.*

The third day at the threshold felt shorter than it should have.

She had expected the waiting to drag. She had experienced enough operational waiting in her career to know that the time before a significant action was usually the slowest time, the mind running the procedure repeatedly, looking for the unaddressed element, the thing that had been missed.

What she found instead was that the time moved at a normal pace, neither slow nor fast, because she was present in it rather than impatient to leave it. Each hour of the final preparation was its own thing: the second diagnostic in the morning, clean; the review of the protocol detail that she had flagged the night before and resolved with six minutes of focused analysis; the quiet midday when she wrote the full account of the machine’s architecture in the field journal, a record that existed now independent of anything else, that would survive regardless of what happened inside the Sink.

Caelan did the same in his own way: a final check of the equipment they would carry into the conversion chamber, a brief conversation with each of the three remaining soldiers about their roles, a moment she observed from across the camp in which he stood alone at the northern edge and looked out at the active zone with an expression she read as someone completing something rather than beginning something.

He was ready. She was ready.

The third diagnostic, in the afternoon, came back clean.

She looked at the results and looked at him and said: “Tomorrow.”

“Tomorrow,” he said.

She wrote the final preparation journal entry as the Star Veins were brightening into the evening pulse: *Third diagnostic clean. Protocol verified. Equipment staged. Evidence archived. Mirael’s fragment secured. Tomorrow we go in and we do what we came here to do.*

*I am not afraid. I have been afraid of things in my life and I know what it feels like and this is not it. What I feel is the opposite of afraid: the feeling of being exactly where I am supposed to be, doing exactly what I am supposed to do, with exactly the right person beside me.*

*My father trusted me. Dorian Drost trusted his son. We are going to be worthy of that trust.*

*Tomorrow.*

She slept better that night than she had since arriving at the Sink.

This surprised her. She had expected the night before the threshold to be restless, the mind active with rehearsal and anticipation. Instead she lay down and was almost immediately in the deep sleep of someone whose body had assessed the situation and decided that the most useful thing it could do was rest.

She woke with the day present and clear.

The Star Veins were in their morning phase, faint in the early light, the silver threads just visible against the pale northern sky. The machine’s hum was at its lowest daily point. The camp was quiet with the particular quiet of people preparing for something, the careful movements and the held focus of a unit that knew what was coming and was ready for it.

Caelan was already up. He was at the camp’s edge doing the assessment, and she watched him complete it and turn and find her watching him, and neither of them said anything for a moment. Then he crossed to where she was and handed her a cup of the camp tea, which she took and held.

“How did you sleep?” she asked.

“Well,” he said. He looked slightly surprised by this himself.

“So did I,” she said.

They stood with their cups and looked at the Sink, the depression in the snow that looked like nothing from the outside and contained everything that mattered, and the morning was cold and clear and the Star Veins above were faint and beautiful and in a few hours none of it would be the same.

She was ready for none of it to be the same.

She wrote her last pre-threshold journal entry standing up, which she had never done before: *Today. The machine, the conversion, the return to what comes after. I am carrying everything I need. So is he.*

*We are going in.* She closed the journal and breathed the cold air and went to meet the day. The machine was below them. The work was clear. The person she was doing it with was beside her. Everything that needed to be in place was in place. She picked up her kit and walked toward the Sink and did not look back at the camp because the camp was not what she was moving toward. What she was moving toward was everything that came after this. She was ready for it. She had been ready for a long time, she thought, and had only been waiting for the circumstances to catch up with the readiness. The circumstances had caught up. Today was the day. She walked forward into it. The morning was everything she needed it to be: cold and clear and present. She had the journal in her pack and the thread supplies and the recording device and the methodology her father had spent thirty years building for her. She had Caelan beside her in the specific way he was beside her, which was the way she had come to understand as the most essential arrangement of all the arrangements they had made. Everything was ready. She walked toward the Sink and let herself feel, fully and without management, the specific quality of this moment: the threshold, the before, the last ordinary breath before everything changed. It felt like being exactly herself. It felt like arriving somewhere she had been moving toward for a very long time.