He heard the sirens before he saw anything.
Three blocks north, converging fast — the specific overlapping wail of multiple emergency vehicles moving toward the same point with the coordinated urgency that meant something significant was happening rather than something routine. Naruto tracked the sound automatically, the way any shinobi tracked sudden environmental changes, and adjusted his walking direction toward it without making a conscious decision to do so.
Old habit.
Loud noise plus converging authority figures plus civilian scatter pattern equaled a situation that needed assessment. Minimum. Possibly more than assessment, depending on what he found.
He turned the corner onto a wider street and stopped.
The source of the sirens was visible half a block ahead — an armored vehicle, military-grade, had driven directly through the front of a bank and was now attempting to reverse back out through the hole it had made while approximately six police cars formed an uneven perimeter around it. The vehicle was matte black with no markings, reinforced plating on every surface, and was moving with the specific purposeful aggression of something that had a plan and was not going to be stopped by police cars positioned across its exit route.
Because the police cars were across its exit route.
Three of them, arranged in a rough V, with officers behind them and weapons drawn.
The armored vehicle accelerated.
Naruto was already moving before he processed the decision — cutting left, finding a fire escape, going up two flights in four seconds because the elevated position gave him a view of the full scene and the full scene was telling him things the street level couldn't.
From above he could see what the officers behind their cars could not: the armored vehicle was not trying to escape through the police perimeter. It was angling slightly, using the reversal as misdirection, and the actual exit plan was the alley to the left of the bank, which was just wide enough to accommodate the vehicle's profile if it turned at the right moment and which connected through to a parallel street where a second vehicle — identical, also matte black — was idling and waiting.
HYDRA, Ryu's memory supplied immediately. Not because the vehicles had markings but because the configuration was exactly what Ryu had seen from inside — the operational pattern, the vehicle type, the complete absence of identifying information. The same organization. Possibly even the same unit that had taken him.
Naruto crouched on the fire escape railing and assessed.
Twelve officers in the perimeter. Civilians scattered but not fully clear — several people frozen in doorways and behind parked cars, a few still moving in the background. The armored vehicle was three seconds from the turn that would take it to the alley. The waiting vehicle in the parallel street was a problem the officers didn't know existed yet.
He looked at the alley.
Then he looked at his wrist.
How's your aim? Kurama asked.
"Unknown," Naruto said honestly. "But I'm a fast learner."
He fired.
The webbing shot from his right wrist across the distance to the alley entrance — forty meters, longer than he had attempted before — and hit the wall at the alley's mouth. He anchored it, fired a second strand from his left wrist to the opposite wall, then two more in rapid succession, weaving them across the alley entrance in a rough cross-hatch pattern at approximately bumper height.
It was not elegant. The strands were uneven, the tension inconsistent, the pattern more improvised barrier than engineered trap.
It held anyway.
The armored vehicle completed its turn and hit the webbing at thirty kilometers per hour.
The result was not what Naruto had expected, which was the vehicle stopping. The vehicle did not stop. What happened instead was that the webbing — strong far beyond what anything biological had a right to be — caught the front bumper, stretched to an extraordinary degree while absorbing the kinetic energy of the impact, and then released it all back at once in a controlled deceleration that spun the vehicle sideways and wedged it diagonally across the alley entrance, completely impassable in either direction.
The vehicle stopped.
Naruto stared at his hands for a moment.
That worked better than expected, Kurama observed.
"Yeah," Naruto agreed. "Yeah it did."
The officers were shouting, repositioning, beginning to process that something had changed in the tactical situation. The armored vehicle was going nowhere. The waiting vehicle in the parallel street, deprived of its expected arrival, idled for approximately four seconds and then accelerated away.
Naruto tracked it.
He could chase it. The webbing made rooftop movement fast enough to keep pace with a vehicle on city streets where traffic created constant interruptions. He could follow it, find where it went, gather intelligence.
Or he could—
His Spider-Sense spiked.
Not the gentle ambient reading he had been running since morning — a sharp specific pulse, directional, coming from inside the bank.
Someone was still in there.
He was off the fire escape before the thought finished forming.
The bank interior was chaos frozen mid-frame — overturned furniture, broken glass, the acrid smell of something that had been on fire and had been extinguished messily, documents scattered across a marble floor that had been expensive before it had been driven over. The HYDRA team had not been subtle about their extraction. They had taken what they came for — Naruto didn't know what yet — and left destruction as a byproduct rather than an intent.
His Spider-Sense was pointing him toward the back left.
A vault corridor, door hanging open, lights inside flickering.
He moved carefully, Taijutsu footwork automatic — weight low, center of gravity controlled, minimum noise from each foot placement. The fluorescent flickering inside the corridor made the shadows jump, which would have been disorienting if he hadn't been navigating combat environments with compromised lighting since he was twelve years old.
The vault was large. The door had been opened with what looked like very sophisticated cutting equipment rather than explosives — clean circular cut through the mechanism, precise, professional. Inside, the safety deposit boxes on the right wall had been selectively opened — not all of them, just a specific row, the contents taken.
In the far corner, behind an overturned metal cart, a woman was crouched with both arms wrapped around a girl who was approximately seven years old. The woman was in bank employee clothing — name tag still attached, hair escaped from its bun, a cut on her forehead that had bled enough to be dramatic but not enough to be dangerous. The girl had her face pressed against the woman's shoulder and her hands over her ears.
Both of them were looking at Naruto with the specific expression of people who had been through something frightening and were not yet certain whether the new arrival was an improvement on their situation.
Naruto crouched down to their level.
"Hi," he said. He kept his voice exactly the same as he had used with wounded civilians in the shinobi world — calm, unhurried, the tone that communicated everything is slowing down now before the words caught up. "The vehicle's blocked. Police are outside. You're okay."
The woman stared at him.
"Who are you?" she said.
"Nobody in particular," Naruto said. "Can she walk?" He nodded toward the girl.
The woman looked at the girl, then back at Naruto. "Yes. Yes, she's not hurt, she was just — they pushed past her and she fell, and I didn't want to move her until—"
"It's okay. Take your time." He glanced at the door, then back. "When you're ready. The officers outside are going to want to talk to you."
The girl lifted her face from the woman's shoulder and looked at Naruto directly for the first time.
She had the clear-eyed assessment of a seven-year-old who had already decided that being scared was not a useful state to remain in and had moved on to gathering information.
"Your clothes don't match," she said.
Naruto looked down at himself. The too-long jeans, the too-wide hoodie.
"I know," he said. "I'm working on it."
"There's stuff on the wall," she said. "Stringy stuff. Did you do that?"
"Yes."
"How?"
"It's complicated."
She considered this. Then she nodded, apparently finding it an acceptable answer, and stood up and took the woman's hand with the pragmatic energy of a child who had processed the available information and reached her conclusions.
They walked out of the vault together, through the corridor, into the main bank floor where two officers were already coming through the front entrance.
Naruto stepped back.
He was almost to the side door when one of the officers spotted him.
"Hey — stop. You need to stay for questioning."
Naruto stopped. Turned. Evaluated.
He could not be questioned. He had no identity in this world, no documentation, nothing that would survive any official scrutiny. He was wearing borrowed clothes, carrying stolen money, in a body that HYDRA was actively searching for, in a city where he knew almost no one.
"I really can't," he said. "But the woman in the vault can tell you everything. She saw the whole operation. And the vehicle that got away went north — dark plates, same model as the one in the alley."
The officer opened his mouth.
Naruto went out the side door.
He was four blocks away and on a rooftop before the officer reached the side exit.
He sat down on a water tower access platform and let his heart rate return to something reasonable. The Spider-Sense had gone quiet again — ambient, background, reading the city without alarm.
He turned over what he had observed.
HYDRA, operating openly in broad daylight in New York City. Specific target inside a specific bank — not a robbery in any conventional sense, not cash, not the general vault. A specific row of safety deposit boxes, opened with surgical precision. Whatever they had come for, they had known exactly where it was and had been willing to draw significant attention to obtain it.
That suggested urgency. Something had changed in their timeline.
He thought about the laboratory he had woken up in. The procedures they had been running on Ryu. The fact that he had been unconscious for weeks, which meant the program was ongoing and his escape had interrupted something mid-process.
HYDRA had lost their test subject.
HYDRA was now moving on what appeared to be a secondary objective with unusual urgency.
The two things were connected. He was certain of it without yet being able to prove how.
You need information you don't have, Kurama said.
"I need someone who knows this world," Naruto agreed. "Someone with access to intelligence about HYDRA. Someone who's already engaged with the problem."
He thought about everything he had read in the library.
The Avengers were too visible, too institutional — walking into Stark Tower with no identity and no introduction to say "hello I'm a reincarnated ninja from another dimension and also I can do this" and shoot webbing at the ceiling was not going to go well in ways he could clearly predict.
S.H.I.E.L.D was a formal intelligence organization and had the same problem at higher intensity.
Spider-Man was seventeen, operated independently, had a secret identity that meant he was accessible without triggering institutional responses, and had a direct personal stake in what HYDRA had done to Ryu's body.
Spider-Man it was.
The problem was finding him.
Naruto closed his eyes and let his chakra extend — thin, careful, the barest shimmer of Sage perception spreading outward from his position. The Natural Energy in New York was different from the forests and mountains of the shinobi world — more chaotic, more fragmented, cut into pieces by concrete and steel and electrical fields. But it moved. Everything alive moved through it.
He wasn't looking for chakra. He was looking for something closer to what he now understood as Spider-Sense — the particular quality of awareness that came from the same biological source as his own webbing. If Peter Parker was in range and active, that awareness would have a specific resonance.
He extended his perception.
Thirty meters. Fifty. A hundred.
Nothing specific. The city was too large, too loud in every energetic sense.
He let it go and opened his eyes.
The practical approach then.
Ryu's memories had an address — not Peter Parker's home address, but the general neighborhood. Queens. A school. Midtown School of Science and Technology, which Ryu had walked past once while exploring the borough and which had stayed in memory because of a bulletin board visible through the fence with the school's academic competition results displayed, and Ryu had stood looking at the names thinking about the parallel life where his parents had lived and he had attended a school like this.
Naruto filed the address.
Then his Spider-Sense spiked again.
Not a direction this time. A quality — the same sharp specific pulse as inside the bank, but without a directional component. Warning without source. Which in his experience meant—
He turned around.
The rooftop behind him was empty.
He looked up.
Twenty meters directly above him, clinging upside-down to the underside of the water tower platform with both hands and both feet in the manner of someone who had been there for an undetermined amount of time with their head tilted at ninety degrees to examine the person sitting below them, was a figure in a red and blue suit.
The figure had lenses instead of eyes — large, white, slightly angled — and was looking at Naruto with the complete attentiveness of someone trying to solve a very interesting problem.
"Okay," said Spider-Man, in the voice of someone who was approximately seventeen years old and trying to sound casual about being upside-down on a water tower, "so I've been following you for about six blocks and I have a lot of questions."
Naruto looked up at him.
"How long were you in the bank?" he asked.
"Long enough." A pause. "You make webs."
"Yes."
"From your wrists."
"Yes."
"Biologically."
"Apparently."
Spider-Man was quiet for a moment. His lenses shifted — some kind of mechanism in the suit, Naruto noted, that changed the shape of the eye openings the way a human expression changed around the eyes. They had narrowed slightly.
"That's," Spider-Man said, "my thing."
"I know," Naruto said. "That's actually one of the things I needed to talk to you about."
Another pause. Longer this time.
Then Spider-Man dropped from the water tower, flipped once in the fall purely out of what appeared to be habit, and landed in a crouch on the platform two meters from Naruto. Up close the suit was more worn than it looked from a distance — small repairs visible in several places, a scuff across the left shoulder that hadn't been fully covered. A working suit, not a display piece.
His lenses were doing the narrowed-expression thing again.
"You know who I am," Spider-Man said.
"Peter Parker," Naruto said. "Yes."
The lenses went very wide.
"How—"
"Library," Naruto said. "Public records, journalism archive, cross-referenced physical description with known associates. You're not as hidden as you think." He paused. "That's not a criticism. Your operational security is reasonable for someone working alone at seventeen. I'm just — I've been doing intelligence work for a long time and the information was available."
Spider-Man stared at him.
"Who are you?" he said.
Naruto considered the question. Not the tactical version of it — not what cover story, what safe amount of information to share, what version of the truth was most useful. He had made a decision walking toward Queens that when he found Peter Parker he was going to tell the truth. The complete truth. Because Peter Parker deserved it, and because Naruto was genuinely terrible at sustained deception even when he tried, and because starting a relationship built on a lie was a reliable way to make the relationship useless when it mattered.
"My name is Naruto Uzumaki," he said. "I'm occupying the body of a person named Ryu Uzumaki who was taken by HYDRA approximately six weeks ago and used as a test subject in a genetics program. The program used your DNA — taken without your knowledge or consent — to modify his biology. Which is why I have webbing."
Peter Parker did not move.
"I'm also," Naruto continued, because he had started and there was no useful stopping point, "a reincarnated shinobi from a parallel dimension who arrived in this body three days ago when my soul was pulled through a dimensional rift during a sealing procedure. I have full access to the techniques and abilities from my previous life in addition to whatever was done to this body. I have roughly eight percent of my normal chakra capacity right now but it's increasing. And I have information about HYDRA's current operations that I think is relevant to you and to this city."
Silence.
The city moved around them, indifferent.
Peter Parker sat down on the platform.
He was quiet for a very long moment.
Then he said, in a different voice — younger, more unguarded, the voice underneath the Spider-Man voice: "Okay so — just to be clear. You're telling me HYDRA stole my DNA."
"Yes."
"And put it in someone else."
"Yes."
"And now that someone else is — you. Who are also a ninja. From another dimension."
"Yes."
Peter looked at his own hands. Then at Naruto's hands. Then back at his own.
"Mr. Stark is going to lose his mind," he said quietly, mostly to himself.
Naruto's Spider-Sense hummed.
Peter's head came up at exactly the same moment — both of them reading the same warning from the same biological source, triangulating automatically, turning toward the same direction on the same rooftop with the same quality of alert attention.
North. Elevated. Moving fast.
Three figures on adjacent rooftops, dressed in black, moving with the specific coordinated efficiency of a trained extraction team.
HYDRA.
They had found him.
Naruto stood up slowly. Beside him Peter Parker stood up at exactly the same speed with exactly the same quality of stillness that preceded movement.
"How much of the ninja stuff works right now?" Peter asked. His voice had shifted again — focused, operational, the Spider-Man voice.
"Enough," Naruto said.
"Define enough."
Naruto's chakra flickered to life around his hands — faint, blue-edged, barely visible in the daylight but real.
Peter's lenses did the wide expression again.
"Okay," he said. "Okay yeah that's — we'll come back to that. Right now—"
"Right now," Naruto agreed.
They both looked at the three figures converging from the north.
"Can you keep up?" Peter asked.
Naruto almost laughed.
"Try to keep up with me," he said, and moved.
End of Chapter 4
Next: Chapter 5 — Two Spiders, One Rooftop, Zero Chill