The scan took twenty-three minutes.
Naruto sat on a platform Tony had directed him to — circular, elevated slightly from the floor, surrounded by a ring of scanning equipment that emitted low hums at frequencies that registered at the edge of hearing. Tony had described the process as passive, non-invasive, purely observational.
It did not feel passive.
It felt like standing inside a very attentive silence. Like the space between a question and an answer. Every few minutes a new system would come online and add its particular quality to the ambient pressure — not painful, not intrusive, but present in a way that reminded Naruto of the moment before a large jutsu resolved, when the chakra had been committed and was building toward outcome and there was nothing to do but hold still and let it happen.
He held still.
Peter had taken a stool near Tony's workbench and was watching the screens with the focused attention of someone trying to read a language they mostly understood. He asked occasional questions — technical, specific, the questions of someone with a scientific background trying to build a complete picture. Tony answered some of them and deflected others with the practiced efficiency of someone who had learned exactly how much information was useful to share in real time versus how much created noise.
Kurama monitored from inside.
The scanning instruments are primitive, he said at one point. Not dismissively — as genuine assessment. They're measuring the surface expression of the compound. They can't see the depth architecture.
Can you?
Some of it. More than yesterday. A pause. It's sophisticated, Naruto. Whatever HYDRA's scientists built, they had access to knowledge that shouldn't exist in this world. The understanding of how Infinity energy interacts with biological tissue at this level of precision — it's not something you develop independently. Someone gave them a blueprint.
From outside. From whatever is moving toward this planet.
That would be my conclusion.
Which means HYDRA isn't the origin point. They're a tool.
Yes. A tool that believes it's in control.
Naruto filed that. It changed the shape of the problem — not eliminating HYDRA as an immediate threat but repositioning them from primary architect to secondary instrument, which meant the decision-making center of the operation was elsewhere. Possibly unreachable in the seventy-two hour window. Possibly the point was never really the beacon activation itself but something that came after.
He thought about this for the remaining minutes of the scan and when it ended and Tony said "okay, we're done, you can step off" he had already reorganized his understanding of the situation twice.
Tony was standing at the main screen, which now displayed a rotating three-dimensional model of something that Naruto gradually identified as a stylized representation of a human body with a secondary overlay of structures highlighted in deep amber — the compound framework, visualized.
It was more extensive than Naruto had expected.
The framework was not localized. It wasn't in one organ or one tissue type or one system. It was distributed — threaded through the cellular structure of multiple systems simultaneously, following pathways that Naruto recognized as the same routes his chakra used. The compound had been engineered to travel chakra pathways. Which meant in this world, in a body with no active chakra practice, it had spread uninhibited because there had been no counter-pressure.
Until Naruto arrived.
That's why it hasn't activated yet, Kurama said, following the same chain of reasoning. Your chakra has been creating passive resistance without either of us knowing. The compound was designed to spread along empty pathways. It wasn't designed to navigate pathways that were already occupied.
So our presence slowed it down.
Significantly, I think. The operative said seventy-two hours. I think without us the timeline would have been shorter. The compound may have already been active.
Naruto stepped off the platform and walked to the main screen.
"You can see the distribution," Tony said, not asking.
"Yes. It followed chakra pathways."
Tony looked at him. "Your — chakra. The energy system you use. It has physical pathways in the body."
"Yes. Like a secondary circulatory system. Not visible to conventional anatomy but functional and mappable." He looked at the screen. "The compound used those pathways as its distribution network. Which means it was specifically designed for a body with that system."
"Designed for you," Tony said.
"Designed for a body carrying an active chakra system," Naruto said. "Or designed with knowledge that the body would be carrying one. Which goes back to the question of who gave HYDRA this blueprint."
Tony was looking at him with an expression that was recalibrating.
"How did you get there," he said.
"The design is too specific," Naruto said. "This compound has Infinity Residue compatibility and chakra pathway interaction engineered into it simultaneously. Infinity Residue is native to this world. Chakra pathways are not. Whoever built this blueprint had knowledge of both systems, which means knowledge of a dimension beyond this one." He looked at the amber overlay on the screen. "HYDRA had a collaborator. From outside."
Tony turned slowly and looked at the screens for a long moment.
"FRIDAY," he said.
"Already running the implication chain," FRIDAY said. "Mr. Stark — if the compound was blueprinted by an external entity with foreknowledge of the subject's biology, then the beacon activation is not an accident of HYDRA's research. It's an intended outcome of a designed operation. HYDRA's role was acquisition and preparation. The actual directive came from—"
"From whatever is coming," Tony said.
"That would be the logical conclusion, yes."
Peter stood up from the stool. He had been quiet for the last several minutes with the quality of someone processing something large.
"So the thing outside the galaxy," he said. "It didn't just notice the Infinity Residue trail by accident. It sent HYDRA a blueprint. It told them how to build a beacon. It told them what kind of body to put it in." He looked at Naruto. "It knew you were coming."
"Or it knew someone like me would come," Naruto said. "The operative said the Uzumaki healing factor was necessary to stabilize the compound. There may have been other candidates before Ryu. Other Uzumaki descendants."
"FRIDAY," Tony said. "Cross-reference known HYDRA genetic research operations with Uzumaki family genetic markers. How many subjects?"
A pause longer than usual.
"Seventeen documented acquisition attempts in the past four years," FRIDAY said. "Twelve were unsuccessful — subjects either escaped or were not viable. Four were acquired but did not survive the initial compound integration. The compounds in those cases degraded before framework completion." A brief pause. "Subject seventeen is the current subject. Ryu Uzumaki. The compound integration is the most successful recorded attempt by a significant margin."
"Because I arrived," Naruto said.
"Because the active chakra system provided structural support that previous subjects lacked," FRIDAY said. "Correct."
The room processed that.
Sixteen people before Ryu. Twelve who escaped or were turned away. Four who didn't survive.
Naruto stood with that for a moment. Not long — there was no useful action available to him for those sixteen people, and standing in grief for the available time was not a trade he could afford. But a moment. They deserved a moment.
Then he moved forward.
"Can you counteract it," he said to Tony. "Now that you have the full structure."
Tony had been expecting the question. He turned from the screen and looked at Naruto directly.
"There are three approaches," he said. "First — surgical removal. Attempt to physically extract the compound from the distribution pathway. Problem: it's threaded through too many systems. Any extraction attempt would essentially be trying to remove a component that's become load-bearing. FRIDAY's projection is—"
"Thirty-one percent chance of survival for the subject," FRIDAY said quietly.
Naruto noted the number without reacting to it.
"Second approach," Tony continued. "Counter-compound. Engineer something that neutralizes the Infinity Residue component of the framework, which should cause the whole structure to become inert. Problem: I don't have a counter-compound. Developing one would take—" He looked at FRIDAY's screens. "Best case, two weeks. We have seventy-two hours. Or less, depending on when HYDRA attempts activation."
"Third approach," Peter said. He had been following the logic chain and arrived somewhere ahead of Tony's presentation.
Tony looked at him.
"You said earlier," Peter said. "You said if we can't stop the beacon, maybe we change what the beacon says."
"Yes."
"What did you mean."
Tony pulled up a new display — the amber framework model, now overlaid with a second set of structures in pale blue. The blue structures were external — not part of the compound, not part of Naruto's biology. They were imposed over the framework from outside, layered over it.
"The compound has a receiver structure," Tony said. "It's designed to accept the Infinity crystal catalyst and then broadcast. What it broadcasts is essentially a location signal — here, this body, this planet, come here. But the broadcast structure isn't fixed until the catalyst activates it." He looked at Naruto. "If we can modify the framework before activation, we can potentially change the broadcast content. Instead of a location signal, we could send — information. Or a signal that's non-directional, that doesn't point back to Earth."
"Or a false location," Peter said.
"Or a false location," Tony agreed. "Yes."
"Can you do that in seventy-two hours," Naruto said.
Tony was quiet for exactly two seconds.
"I can try," he said. "Which in my experience is usually the same as yes, it just takes longer and involves more coffee." He looked at the screens. "But there's a component I can't address with technology alone. The modification needs to be made at the framework level — inside the cellular structure. And the only thing that has access to that level is—"
"The chakra system," Naruto said.
"Your chakra system," Tony confirmed. "You'd have to modify the framework from inside. Using whatever internal access your chakra gives you to the cellular structure."
Naruto thought about what that meant practically. Chakra had always been precise work at high levels — Sage Mode, the Yin-Yang release, the complex sealing techniques he had learned over decades. This was asking him to do microsurgery on his own cellular biology using a system he was currently running at eight percent capacity in a body he had occupied for four days.
Possible, Kurama said. Difficult. But possible. I can guide the navigation. I've been mapping the framework since we woke up.
How long would it take.
At current capacity? I don't know. We've never done anything like this before.
Tony was watching Naruto's expression.
"You're talking to the fox," he said.
"Yes."
"What's the verdict."
"Possible," Naruto said. "Difficult. Unknown timeline." He looked at Tony. "What do you need from me for the modification plan."
"Time to model it," Tony said. "I need to map what a non-location broadcast would look like, build the modification parameters, and translate them into something your chakra can execute. That's—" He looked at the screens. "Eight hours minimum. Probably more like twelve."
"Which leaves sixty hours."
"Approximately."
"For my chakra to recover enough to execute the modification."
"Yes."
Naruto did the math. Sixty hours of recovery from eight percent. His current rate of recovery — measurable, consistent, the Uzumaki healing factor and Kurama's presence both pushing the rate higher than Kurama's initial estimate — suggested he would be at somewhere between forty and fifty percent capacity in sixty hours.
Was forty percent enough for cellular-level chakra surgery on a HYDRA-engineered Infinity compound?
He didn't know.
He knew he was going to try anyway.
"Okay," he said. "What do you need from me for the next twelve hours."
Tony blinked. Apparently he had expected more negotiation.
"Rest," he said. "Eat. Let the recovery happen. Don't use chakra for anything non-essential — conserve everything toward the procedure." He paused. "And stay in the building. If HYDRA is tracking you, which they almost certainly are, you're safer here than anywhere else in the city."
"He can have the guest floor," Peter said. "It's where I stay when—"
"When things go sideways," Tony said. "Which it does with regularity." He looked at Peter. "You're staying too. I need your input on the framework modification and your biology as a reference point since the compound is built on your DNA template." He turned back to his screens. "FRIDAY, get Bruce on a video call. And send someone for that ramen."
"The ramen arrived fourteen minutes ago," FRIDAY said. "Happy signed for it."
"Of course he did." Tony turned away and began pulling data. "There's a kitchen on the guest floor. Eat something. Sleep if you can. I'll have preliminary modification parameters ready in eight hours. Uzumaki—"
"Naruto," Naruto said.
Tony glanced at him over his shoulder.
"Naruto," he said. The slight adjustment in his tone was minimal but present — the difference between addressing a subject and addressing a person. "Eight hours. Don't do anything interesting in the meantime."
"Define interesting," Naruto said.
"If it requires webbing or glowing hands, it's interesting."
"Understood."
The guest floor was three levels up, accessible by elevator or by a stairwell that Naruto used instead because he had been in the building for less than two hours and he did not yet know all the exits, and knowing the exits was a habit he did not intend to break.
The space was larger than any room he had occupied since arriving in this world — clean, functional, with windows overlooking the city from a height that turned the street-level chaos into something abstract and almost peaceful. There was a kitchen attached, small but equipped. The ramen was in a paper bag on the counter, still warm.
He ate standing up, looking out the window at the city.
Peter came in behind him and went directly to the refrigerator with the comfort of someone familiar with the space.
"How are you actually doing," Peter said. "Not the operational version."
Naruto considered the question while he ate.
"There's a countdown in my body," he said. "Sixty-something hours. I'm at eight percent capacity in a system I need at forty or more to address it. I don't know if the modification plan will work. I don't know what happens if it doesn't." He looked at the ramen. "And the ramen here is different from home but it's actually quite good."
Peter closed the refrigerator and leaned against the counter looking at him.
"You separated those things very cleanly," he said. "The problems and the ramen."
"The ramen is solving one of the problems," Naruto said. "Caloric intake supports recovery. Recovery supports chakra generation. Chakra generation supports the procedure." He looked at Peter. "Everything is connected. You just have to find the connection that makes the small thing also the large thing."
Peter was quiet for a moment.
"Ryu would have liked you," he said. Then he stopped, uncertain whether that was the right thing to say.
"Tell me about him," Naruto said.
Peter looked at him. "I didn't know him."
"But you know his file. Tony would have pulled everything."
"I — yeah." Peter was quiet for a moment. "Seventeen. Queens, originally. Parents died when he was fourteen. Good at science, from what the school records showed — he was in the application process for Midtown before everything happened. He—" Peter stopped.
"What."
"He was on the Midtown application waitlist," Peter said quietly. "He would have been at my school. We might have—" He stopped again.
Naruto looked at him.
"We might have been friends," Peter said. Simply. Without dressing it in anything else.
Naruto looked out the window at the city.
"Then we will be," he said. "Forward from here. That's what I can give him."
Peter didn't answer immediately. When he did, his voice was slightly different — less careful, more direct.
"Yeah," he said. "Okay. Yeah."
They stood in the kitchen of Tony Stark's guest floor while the city moved outside the windows and somewhere below them Tony was building a modification plan and somewhere in the cellular structure of Naruto's borrowed body a countdown was proceeding and somewhere beyond the edge of the galaxy something old and patient was waiting for a signal that they were going to spend the next seventy-two hours making sure it never received.
Naruto finished the ramen.
He set the container down and looked at the city.
"Kurama," he said quietly.
Yes.
"We've handled worse than this."
We have, the fox said. And then, after a pause that carried fifty years of shared history in it: But not much worse.
Naruto almost smiled.
"Almost makes it interesting," he said.
You've always been an idiot, Kurama said.
But you're my idiot.
Don't make it weird.
Naruto did smile then — fully, in the empty kitchen, with the city spread out beyond the glass and sixty hours on the clock and the specific quiet certainty of someone who had been to the end of their rope more times than they could count and had always, always found one more thing to hold onto.
He turned away from the window.
"I'm going to sleep for six hours," he said to Peter. "Wake me if anything changes."
"Tony will have things ready in eight—"
"I know. Six hours of sleep, two hours of chakra meditation before he's ready. It's the most efficient allocation." He moved toward the hallway. "Which room."
"Second door on the left," Peter said.
Naruto went to the second door on the left, lay down on a bed that was significantly more comfortable than a fire escape, and closed his eyes.
He was asleep in ninety seconds.
Outside the windows New York continued without him, carrying its eight million lives forward through a morning that felt ordinary from the street but was anything but, and sixty hours became fifty-nine, and in the deep structure of his cells something built from Infinity energy and HYDRA science and another world's blueprint continued its patient work.
But slower than it should have.
Because something else was in the way.
End of Chapter 7
Next: Chapter 8 — Sixty Hours