They were back on the Ashfront by nightfall.
The journey out of the Crest system felt different from the journey in. Going in there had been the anticipatory dread Sera had named the night before, the weight of not knowing pressing against everything. Coming out there was a different weight entirely, heavier in some ways and lighter in others, the specific burden of people who had found out something enormous and now had to decide what to do with it.
Nobody talked much on the return flight.
Fen worked. The transmission he was building was more complex than anything he'd attempted before and he said so once and then said nothing else and worked. Maren flew. Osk sat with his arms crossed and his eyes on the forward display and processed whatever Osk processed in the particular stillness he brought to large things. Varek sat in the rear of the scout ship with his datapad and wrote what Nix assumed was the most significant report of his career, his face carrying the expression of someone choosing each word with the understanding that the words were going to matter.
Sera sat next to Nix and their shoulders touched and that was enough.
At one point she said, quietly, "Six hundred thousand."
"Yes," he said.
"Held," she said.
"Yes," he said again.
She was quiet for a moment. "I keep trying to imagine what it's like from their side. Whether they're aware of it. Whether time passes for them in the between the way it does for us." She paused. "Whether the person who was writing that letter knows three paragraphs are sitting on their kitchen table."
Nix had been trying not to think about that specifically because when he did something in his chest did something complicated that he couldn't manage and drive at the same time. "Fen's next transmission will try to ask," he said.
"I know," she said. "I'm just sitting with it in the meantime."
He took her hand.
She held it and looked at the forward display and they sat with it together for the rest of the flight.
The Ashfront crew had kept the monitoring running continuously in their absence and met them in the hangar with the sensor logs and the looks of people who had been waiting at a significant remove from something significant and were aware of the gap that created.
Varek went directly to his office.
Nix went to his quarters and sat on the cot and looked at the viewport for exactly four minutes and then got up because sitting wasn't something his body was willing to do right now. He went to the mess and made something hot and stood at the small viewport there instead, which was the same dark from a different angle, and drank it without tasting it.
Fen appeared in the doorway twenty minutes later.
"I'm sending it," he said.
"Now," Nix said.
"Now is better than tomorrow," Fen said. "Every hour we wait is an hour they don't know we understand." He paused. "I think that matters. I think they've been waiting for acknowledgment the same way they waited for acknowledgment of the first transmission."
"Send it," Nix said.
Fen sent it from the comms room at 2200 and then came back to the mess and sat down across from Nix and they both drank something hot and didn't talk about it because there was nothing useful to say while waiting for a response that could take hours or days.
"The school," Fen said eventually.
Nix looked at him.
"In Harren," Fen said. "The classrooms. The work on the boards." He looked at his cup. "I keep thinking about who was supposed to be in those rooms. Whether they know they should have been somewhere that morning."
"You and Sera are doing the same thing," Nix said.
"Imagining it from their side," Fen said. "Yes." He paused. "It's not useful. But I can't stop doing it."
"I know," Nix said.
They sat in the quiet.
"When we get them back," Fen said.
"When we get them back," Nix agreed.
Fen nodded and went back to the comms room and Nix stood at the viewport and the dark outside did what it always did and somewhere two days behind them a city of ninety thousand people waited with its lights on.
Varek called a full briefing the next morning at 0800.
He looked like he'd slept approximately as much as everyone else, which was not much, but his report was finished and the Council had received it and the stillness that greeted the team when they came in had a different quality from the briefing room stillness they were used to. Something had shifted overnight in Varek's understanding of what came next and hadn't fully settled yet.
He waited until everyone was seated.
"The Council received my report at 0100," he said. "I've had three conversations with senior members since then. The response has been." He paused. "Varied."
"Define varied," Maren said.
"The two newer members want immediate public announcement," Varek said. "Full disclosure. What the Reapers are, what happened to the worlds, what we've established through the transmissions, all of it. They believe the public has a right to know and that managing the information any further is both ethically indefensible and practically unsustainable." He paused. "The senior members are more cautious."
"What does cautious mean in this context," Sera said, with the specific flatness she used when cautious was doing too much work as a word.
"It means they're concerned about the scale of what disclosure involves," Varek said. "We're talking about telling forty systems that six hundred thousand of their people are alive in a state that we don't have a complete scientific framework for, held by non-human entities through a mechanism we don't fully understand, with a return process we haven't confirmed is possible yet." He looked around the room. "The senior members believe that announcing before the return mechanism is confirmed risks creating a situation they can't manage. Public pressure for immediate action before we understand what immediate action looks like."
"The public pressure would be justified," Osk said.
"Yes," Varek said. "It would." He didn't argue with that. "The question is whether justified pressure applied before we have a confirmed mechanism helps or hinders the process of actually getting people back."
The room sat with that.
"What did you recommend," Nix said.
Varek looked at him. "I recommended a middle position. We don't announce everything. We announce that an expedition to Crest has confirmed the world is structurally intact and that there is evidence the population may be recoverable. We say we're pursuing that actively." He paused. "We give people hope without giving them a timeline we can't keep."
"And the Council's response," Sera said.
"They're discussing it," Varek said. "Which means they haven't said no."
"They haven't said yes either," Maren said.
"No," Varek said. "They haven't."
Nix looked at the table. He thought about the photograph on the desk in Harren. The family on the recreational trip. The people in that photograph were held somewhere, in whatever the between was, and their picture was sitting on a desk in an empty office and somewhere in the forty systems people who loved them had spent six months believing they were gone.
"What does the mechanism question actually depend on," he said. "Fen's next transmission. What specifically do we need from it."
Fen had been quiet since the briefing started, running something on his datapad. He looked up. "Two things. How the holding works, meaning the nature of the between and what it requires to maintain. And what the return process involves on our end." He paused. "The second one is the critical question. If the return requires something from us specifically I need to know what before we can confirm it's possible."
"Something from us specifically," Varek said.
Fen looked at Nix.
"From me specifically," Nix said.
"The transmission said the gap closing makes the returning possible," Fen said carefully. "That's not a coincidence of timing. The gap closing is structurally connected to the return being available. Which means whatever the mechanism is, it runs through what changed when contact happened." He paused. "I don't know what that means in practice. That's what the next transmission needs to answer."
The room was quiet.
"The response to last night's transmission," Nix said. "Anything yet."
"Not yet," Fen said. "But the previous response times have ranged from forty minutes to several hours. It hasn't been twelve hours yet."
"Then we wait for the response," Nix said. "And while we wait Varek works on the Council." He looked at Varek. "The middle position. Push for it."
"I am pushing," Varek said. "I've been pushing since 0100."
"Push harder," Nix said.
Something in Varek's expression shifted slightly, the shadow of something that wasn't quite a smile but was adjacent to approval.
"The briefing is done," Varek said.
People moved.
The response came in at 1340.
Twenty six seconds. The longest single transmission they'd received.
Fen pulled it into his analysis program and looked at the waveform for a long moment before he said anything. The whole team had gathered in the comms room when the alert went out, the same way they'd gathered every time, the pull of something significant producing the same reflex regardless of how many times they'd been through it.
"It's dense," Fen said. "The structural complexity is the highest I've seen." He ran the first pass analysis. "I need time."
"How much," Sera said.
"I don't know," he said. "This is different from the previous transmissions. The previous ones were built from vocabulary we'd established. This one is using that vocabulary to say something that requires new constructions I haven't seen before." He paused. "It's trying to explain something that doesn't have a precedent in what we've exchanged so far."
"The mechanism," Nix said.
"I think so," Fen said. "Which means I need to get this right."
"Take what you need," Varek said. "We're not going anywhere."
Fen settled into his chair and went to work with the focused total absorption he brought to things that mattered, the room around him becoming irrelevant, the twenty six seconds on his display becoming everything.
The team dispersed. Not far. The specific dispersal pattern of people who needed to move but didn't want to be out of reach when something happened.
Nix found himself in the corridor outside the comms room, sitting against the wall with his back straight and his eyes on the middle distance, doing the thing Sera had taught him in training, not fighting the waiting but sitting inside it.
The thing in his chest was warm again in the way it had been in Harren. Present and steady and connected to something larger than the ship around him.
He tried to understand it the way he'd learned to understand everything else about himself, by attention rather than assumption.
It felt like proximity. Not physical proximity, the formation was still at the boundary, two days away. Something else. Something closer to the relationship between a frequency and the thing generating it, the quality of resonance when two things were operating in the same register.
He was connected to whatever the between was.
Because the gap had closed.
Because the gap closing had made the returning possible.
He sat with that and let himself follow the thread carefully, the way he'd learned to follow every thread, without deciding where it ended before he found the end.
The between was held by the formation. The formation's nature had a component now that hadn't been there before the contact. The absence marker in the entity's frequency signature that Fen had noted the day after the gap closed and still couldn't fully explain.
The gap closing had left something of what he was in what they were.
And something of what they were in him.
He put his hand flat against his chest and felt the warmth there and thought about what it was connected to.
He was still sitting against the wall thinking about that when Sera came and sat beside him two hours later and didn't say anything and he didn't say anything and they sat there together until Fen's voice came through the comms with a quality that made everyone in earshot stop what they were doing.
"I have it," Fen said. "Briefing room. Now."
They came in fast and sat down and Fen stood at the front with the twenty six second waveform on the display and the expression of someone who had been carrying something for two hours and was finally putting it down.
"I'm going to read the full translation first," he said. "Questions after."
He looked at his datapad.
"What is held is held between what searches and what is found. The between is not a place. It is a relationship. It has always existed in the space between what we are and what a Void is. We did not know how to use it before the gap closed. The gap closing showed us the between could be inhabited. We used what we learned to hold what could not be left behind. What is held exists in the connection between us. The connection runs through the one who closed the gap. The returning requires the connection to open in the other direction. What entered through the gap can return through the gap. The one who closed the gap must ask for the returning. We do not know the shape of the asking in your terms. We know only that the asking must come from the absence that became presence. From the one who carries both."
Fen lowered his datapad.
The room was completely still.
"The mechanism," Varek said slowly. "Is Nix."
"The mechanism is the connection," Fen said. "Which runs through Nix. Yes." He paused. "The between is a relationship between the Reapers and a Void. The gap closing made that relationship inhabitable. They used the inhabitable between to hold the populations rather than leaving them behind when the search moved through the worlds." He looked at Nix. "The return requires Nix to open the connection in the other direction. The gap closing brought something of what they are into him. The return means bringing something of what was held back through that same connection."
"Six hundred thousand people," Osk said. "Through Nix."
"Through the connection," Fen said. "Which runs through Nix." He paused. "I don't know what that means physiologically. I don't know what the asking looks like or what it costs or how it works in terms of any framework we have." He looked at Nix. "The transmission says they don't know either. They know the asking must come from the absence that became presence. They know the direction runs the other way from how the gap closed. The specifics are." He paused. "Something we'd be doing for the first time."
"Same as everything else," Maren said from the corner.
"Same as everything else," Fen agreed.
Nix looked at the waveform on the display. Twenty six seconds. The most complex transmission they'd received. An explanation of a mechanism that had no precedent in anything they understood.
He thought about the warmth in his chest. The connection running to the between where six hundred thousand people were held. The direction the gap had closed and the direction it needed to open.
He thought about the absence that had become presence.
He thought about what he was carrying and what it meant to carry it.
"Can you ask them more," he said to Fen. "About what the asking involves. What I'd actually be doing."
"Yes," Fen said. "That's the next transmission."
"Build it," Nix said.
He looked around the room. At Varek who was doing rapid calculations behind a controlled expression. At Osk who was watching him with the quiet unhurried attention that meant he was already accepting something while Nix was still working toward it. At Maren who was looking at the waveform with those tired sharp eyes and something in his face that was more open than usual.
At Fen who had given six months of himself to building a bridge between two things that had never been able to talk to each other and had just translated the most important message he'd ever decode.
At Sera.
She was looking at him steadily with the open expression and something underneath it that was careful in the way she was careful about things that mattered enormously. He could see her working through it, the thread she was following, where it arrived.
She arrived at the same place he'd arrived at twenty minutes ago in the corridor.
He could see the moment she got there.
She didn't look away from him and he didn't look away from her.
"Varek," Nix said without breaking the look.
"Yes," Varek said.
"Go back to the Council," Nix said. "Tell them we have the mechanism. Tell them we're confirming the details and then we'll have a timeline." He paused. "Tell them it's time to tell people."
Varek was quiet for a moment.
"Yes," he said. "It is."
He left to make the call.
Fen went back to his workspace to build the next transmission.
Osk and Maren filtered out until it was just Nix and Sera in the briefing room with the twenty six second waveform on the display.
She got up and came around the table and sat on the edge of it in front of him, close enough that their knees almost touched, and looked at him with the direct unguarded expression.
"The absence that became presence," she said.
"Yes," he said.
"That's you," she said.
"Yes," he said again.
"And six hundred thousand people are held in the connection that running through you made possible," she said.
"That's what the transmission says," he said.
"And the returning runs the same way," she said. "Through you."
"Through the connection," he said. "Which yes. Runs through me."
She held his gaze.
"I'm not going to tell you not to do it," she said. "For the same reason I didn't tell you not to say yes to the gap closing. The math doesn't leave room for it." She paused. "But I need you to tell me what Fen's next transmission says before you do anything. I need to know what it costs."
"I need to know that too," he said.
"And you'll tell me," she said. "Before you decide anything."
"I'll tell you," he said. "Before I decide anything."
She held his gaze for another moment. Then she put her hand on the side of his face briefly, warm and solid and real.
"Okay," she said.
She got up and went to help Fen.
Nix sat in the briefing room alone with the twenty six second waveform and the warmth in his chest and the weight of six hundred thousand people held in the connection that the gap closing had made.
Outside the Ashfront the dark did what it always did.
Except in two days in the direction he couldn't see from here the lights of Harren were still on.
He was going to bring them home.
He just needed to find out what that cost first.