While Finn and his companions were spread around a stone table in the Land of Rain studying a map, the Hidden Leaf Village was dealing with its own version of the same general problem: information that made no sense and no one to explain it.
In the Hokage Building, Sarutobi Hiruzen was looking at a battle report with the kind of stillness that precedes a very controlled response to very bad news.
"Impossible," he said. His voice was quiet. "Kagami is one of the strongest shinobi we have. He doesn't just disappear on the front line. Send more people. I want him found."
The ANBU ninja kneeling before his desk did not look up. "Sandaime-sama," he said carefully, "it has been half a month."
The anger in Sarutobi Hiruzen's eyes faded. What replaced it was heavier and more permanent: grief wearing the face of a man who had learned to manage it rather than express it.
The Third Shinobi World War had not been kind to Konoha. The village had won, or was winning, or would win, depending on which front you looked at on any given day. But victory in a war of this scale did not mean what people imagined it meant before they experienced it. The economic cost was immense. The military cost was worse. A significant portion of the village's elite had been killed in engagements that no one had fully anticipated, by a war that had ignited faster than the diplomatic machinery could respond to. The victory would be real when it came, and it would not feel the way victory was supposed to feel.
Internal pressures were building too, quietly, in the spaces between the official reports. Sarutobi Hiruzen was aware of them. He was aware of most things. The question that occupied him more than the war itself was what would happen to the village after it ended, when the external threat that was holding everything together with pressure and necessity was removed and people began looking at each other again.
Kagami's disappearance sat in the middle of all of that like a stone dropped into still water.
Uchiha Kagami was not merely a strong shinobi. He was the figure most likely to represent the Uchiha clan's interests in Konoha's leadership, and to do so in a way that the other factions in the village could accept. His lineage was correct: trained directly by Tobirama Senju, trusted explicitly by the man who had done more than anyone to institutionalize suspicion of the Uchiha clan. His relationships were correct: a close friend of the current Hokage, recognized by the Senju tradition, not associated with the more aggressive faction of the Uchiha. If anyone was positioned to gradually reduce the internal friction between the Uchiha and the village's power structure, it was Kagami.
And now he was gone. Presumed killed by the Hidden Cloud. Half a month with no trace.
Sarutobi Hiruzen sat with the battle report in his hands and thought about who benefited from that absence. The list was not long. It pointed in a direction he was not ready to follow to its conclusion, partly because the evidence was circumstantial and partly because acting on it during an active war carried its own category of risks that he did not want to introduce into an already unstable situation.
He thought about Danzo Shimura the way he always thought about Danzo Shimura: with a combination of old affection, genuine frustration, and the specific tiredness of a man who has repeatedly chosen not to do what the situation technically warranted because the personal cost was too high. They had come from the same teacher. They had been young together, had stood in the same rooms and received the same instruction and chosen different interpretations of what that instruction meant. Sarutobi could not make himself believe that Danzo would have moved against Kagami directly. He wanted very badly not to believe it. That wanting was doing work he should not have let it do.
"Send the security division," he said finally. "Have Uchiha Fugaku lead a Uchiha contingent to the front line."
"Yes, Sandaime-sama." The ANBU vanished.
At the Uchiha compound, Uchiha Fugaku received the order in the courtyard with his young son standing at a distance, watching.
Uchiha Itachi was four years old. He had his father's eyes and the particular quality of attention that people who would later become extraordinary sometimes show very early: a stillness, a noticing. He had been watching the ANBU ninja arrive, exchange words with his father, and leave. He had been watching his father's face change.
When Fugaku turned and looked at him, the expression he produced was the one that adults produce for children when they have decided to tell the truth but not all of it.
"It's cold. Go inside."
"Father," Itachi said. "Something happened."
Fugaku was quiet for a moment. His shoulders carried something that had not been there before the ANBU's arrival, a weight that was specifically grief rather than worry. "Your uncle Kagami," he said. "He died on the front line."
Uchiha Itachi was four years old. He had met Kagami many times; the man had been a constant presence in the Uchiha compound's more formal gatherings, and had visited more informally because of his connection to Shisui, whose father had been Kagami's younger brother. Kagami had never married. Had left no descendants of his own. Had directed what care he had toward the nephew left in his keeping, and through Shisui had extended that care to Itachi as well, treating the boy with the particular warmth of someone who was generous with the affection he didn't express directly.
Itachi stared at his father and didn't say anything for a moment.
The Sharingan opened with grief. That was the mechanism: loss, specific and irreplaceable, striking something in the Uchiha nervous system that the eye responded to. Kagami had never left descendants partly because he understood what that path looked like. To open the Mangekyō required losing the person closest to you. To sustain the Mangekyō without eventual blindness required taking the eyes of a sibling. The bloodline was power but the power was built from suffering, and Kagami had perhaps decided, somewhere along the way, that whatever he had taken from the world in the form of capability did not need to be passed forward to the next generation as a biological inheritance.
Itachi Uchiha, four years old, learning what war cost, with the particular stillness of a child absorbing something too large for his current framework to fully contain.
That seed, planted in that moment, would grow into something specific. Not today. Not for years. But it would grow.
"Tomorrow I will take some of the clan's best to the front," Fugaku said. He reached out and put his hand on his son's head, an awkward gesture from a man who was not naturally demonstrative. "While I'm gone, you're the man of the house. Look after your mother."
"I will," Itachi said.
"You are my pride." Fugaku's voice had changed slightly, carrying something underneath the words that was not quite what the words said. "Yours and the clan's. I look forward to seeing what you become."
He took his son's hand. They went inside.
On the other side of Konoha, deep underground, in a building that did not appear on any of the village's official maps, Orochimaru was doing something that required complete concentration and was doing it with the focused serenity of a man who found his work genuinely absorbing.
He was wearing a pale yukata, tied at the back with a butterfly-knot sash. His skin was the color of something that had not seen sunlight in a long time. The pale eye shadow on either side of his nose was the only color in his face that wasn't gray or black, and his pupils were vertical: the slit pupils of something that had decided ordinary eyes were a limitation. Against his neck hung magatama pendants that swayed slightly when he moved.
He did not look like a man. He looked like an idea of a man that something had assembled from available materials and then decided to leave slightly incomplete in specific ways.
The laboratory around him was organized with the thoroughness of someone who could not tolerate disorder in their working space and had the patience to impose order on a great deal of material. Glass tanks lined the walls from floor to ceiling, each one filled with solution, each one containing a body in some stage of preservation or decomposition. The bodies were labeled. The solution levels were consistent. The tanks were arranged in a sequence that made sense if you knew the research question being investigated. The operating table at the center of the room held a current subject and the various instruments Orochimaru was using on it had been placed in order of use rather than size.
The door opened.
Danzo Shimura entered without announcing himself, which suggested either that he did not feel the need or that he knew Orochimaru well enough to know that announcing himself would produce no particular result. His posture was healthy, his body unmodified; the later extensive work he would do to himself had not yet been undertaken. What was already present was the temperament: a grayness that was not sadness but something more structural, the quality of a man who had decided some decades ago that the world's softnesses were liabilities and had been systematically removing them from himself ever since.
"Results?" Danzo said.
Orochimaru did not look up from the operating table. He raised one hand and pointed across the room.
On a table against the far wall was a pile of tissue that had ceased to hold its shape. It moved faintly, the motion of cells too dense with their own vitality to fully stop even after the structure they had been part of had dissolved. Alive, technically. Not recognizable as anything that had once been a coherent form.
Danzo looked at it. "Failed again."
"The First Hokage's cells are simply incompatible with ordinary human biology at the systemic level," Orochimaru said, with the tone of someone explaining a result they find interesting rather than disappointing. "Once they are introduced into a host, the proliferation is not gradual. It is immediate and total. The host's own cellular structure cannot integrate with Hashirama's cells; it is eroded by them. The host collapses. What you see on that table is the outcome at the point of collapse."
The research they were conducting was not new in concept. After the First Hokage's death, Konoha had lost the Wood Release bloodline limit entirely. No one had inherited it. The clan had produced no second instance of the ability. And the loss was not merely sentimental: Wood Release was the most effective known technique for restraining the Tailed Beasts, and without it, that category of threat had no reliable counter. The village's leadership had understood this and had commissioned preliminary research. The research had proven too dark in its methods to remain officially sanctioned. It had then continued anyway, under the management of the people in this room.
"Then find someone who can withstand it," Danzo said.
"I intend to," Orochimaru said, and returned to the dissection.
He was, at this stage, still technically a Konoha shinobi. The ROOT organization had absorbed him after the Second Shinobi World War, which had suited him well enough: funding, facilities, institutional cover, and the freedom to pursue research questions that the village's official ethics frameworks would not have permitted. The arrangement served Danzo's interests and served Orochimaru's interests, which was the foundation of most functional working relationships. He had joined voluntarily and with clear eyes about what he was joining.
The research would eventually be exposed. When it was, the formal separation between Orochimaru and Konoha would become permanent rather than nominal. Without the exposure, he would have remained a candidate for the Fourth Hokage position, which was, viewed dispassionately, a reasonable assessment of his standing in the village's power structure. He was brilliant, he was technically a Konoha shinobi, and his capabilities were substantial. The question of what Konoha would have looked like under an Orochimaru Hokage was the kind of question that answered itself very quickly in very dark directions, but the access was there.
That path was closing, slowly, by increments. Neither of the men in the room was aware of how close it was to fully closed.
Danzo left without further comment. Orochimaru continued working. The tanks on the walls held their contents quietly in the solution, and the cells on the far table continued their faint restless motion, alive and formless, waiting for someone to figure out what to do with them.