They went at midnight.
Five of them this time Kazuki, Aeva, Rina, Kenji, and Elena, who Kazuki had invited with the specific intention of watching who she informed before they left and who she did not. She had informed nobody. She had put her coat on and come without questions.
He filed that. Added it to the other things he was holding about her. The picture was not complete yet. He needed more pieces before he understood the shape.
The maintenance corridor was darker than before. The emergency lighting that had been working on Kazuki's first visit had failed in the two days since one panel completely dead, the others flickering at irregular intervals that made the space feel like it was breathing.
Darius was in the same spot. Same wall. Same position.
But the difference between two days ago and now was visible from the entrance to the corridor.
The black lightning was no longer small arcs tracing his neck and jaw. It moved across his entire upper body in continuous, restless waves not dramatic, not loud, just constant. Like a fire that had given up burning brightly and settled into a steady, determined consumption. The cracks in his suit were wider. The unhealthy black glow from them was brighter.
He looked up when they entered. His eyes went to each face in sequence Kazuki, Aeva, Rina, Kenji and then stopped on Elena.
Something shifted in his expression.
"You brought the doctor," he said.
"She's with us," Kazuki said.
Darius looked at Elena for another moment. Then he looked away without elaborating on whatever the moment had been.
"Worse," Aeva said, looking at the lightning across his chest. Not a question.
"Yes." No drama in it. Pure information. "I have maybe four days where what I tell you is reliable. After that the deterioration affects retrieval." He looked at his own hands — the black energy playing across his knuckles in steady, quiet pulses. "Ask what you need to ask."
"The third file on Renji's chip," Kazuki said. "He spoke to someone who wasn't in the room. Said they came back to fix something. That the recognition protocol would have registered their proximity when I found the password." He held Darius's gaze. "That was you."
Darius was quiet for exactly three seconds.
"Yes," he said.
"You've been here before. Not just three weeks. Before this timeline started."
"Before this version of it," Darius corrected. "I've been in six timelines total. Three of them I arrived too late. Two of them I arrived in time but made the wrong choice about who to trust." He looked at the floor. "This is the sixth."
The corridor was very still.
"What's different about this one?" Aeva asked.
Darius looked at her. The amber from the disc was not present the disc was back at the garage but something in how he looked at her carried the same quality. Recognition. A specific, careful recognition.
"You," he said simply. "And the suit he left behind." He looked at Kazuki. "In every previous timeline, the Mark II didn't exist. Renji died before he finished it. The data chip was never completed. The password partition was never built." A pause. "This is the only timeline where Renji had enough time to finish what he was building."
"Someone gave him more time," Kazuki said.
"Yes."
"You."
Darius did not answer immediately. He turned his hand over and looked at the back of it at the black lightning running across his knuckles.
"In timeline four," he said, "I found Renji eight months before his death. I had information from the previous timelines things that had happened, things that could be changed. I gave him what I could. I told him about the stabilizing variable. I told him about the disc. I told him what the chip needed to contain and why the password had to be what it was." He paused. "I gave him eight months of things he would have taken three years to discover on his own. It wasn't enough to save him. But it was enough for him to finish the suit. Finish the chip. And leave behind everything you needed to find."
Kazuki thought about Renji looking slightly to the left of the camera.
I know you can hear this. I know what you came back to fix.
Renji had known. He had built the acknowledgment into the recording deliberately a message for Darius, knowing Darius would be in proximity when the chip was opened, knowing the recognition protocol would alert him.
"The chip registered me when you opened it," Darius confirmed, reading Kazuki's face. "I felt it from the maintenance corridor. A proximity alert built into the partition architecture. Renji's design."
Elena spoke for the first time since they had arrived. Her voice was quiet and precise and carried the specific weight of someone who had been listening to information and had just heard something that changed its arrangement.
"You said you made the wrong choice about who to trust," she said. "In timeline five."
Darius looked at her.
"Yes," he said.
"Who did you trust?"
The corridor was very quiet.
Darius held Elena's gaze for a long moment. His expression was not hostile. It was the expression of someone looking at a thing they have been looking at for a long time from a distance and have now seen up close and found it to be exactly what they feared and hoped simultaneously.
"Someone who was trying to do the right thing," Darius said carefully. "In the wrong direction."
Elena said nothing.
Kazuki looked at her. Then at Darius.
He did not ask the follow-up question out loud. He did not need to. The answer was already in the room, distributed across the faces of everyone present, waiting for the moment when the full picture became unavoidable.
"One more thing," Darius said. He reached into his suit and produced a second disc. This one was different from the first — gold instead of black, the same hairline groove across its center, but the groove was already glowing. Steadily. Without anyone touching it.
"I've been carrying this for six timelines," Darius said. He held it out toward Aeva.
She looked at it. At the glow.
She took it.
The moment it touched her palm, both discs the gold one in her hand and the black one back at the garage two blocks away pulsed simultaneously. A single pulse. The same rhythm as the Core.
As Kazuki's heartbeat.
"What does it do?" Kazuki asked.
Darius leaned his head back against the wall.
"Ask the suit," he said. "It already knows."
The black lightning moved across his chest in slow, patient waves.
Outside, the city ran its midnight cycle, unaware that in a maintenance corridor beneath its transit hub, the sixth attempt at saving everything was either beginning or ending, and the difference between those two outcomes had just been placed in someone's hands.
[To Be Continued...]