The blind, seventy-year-old Ke Zhen'e transmigrates bodily into the war-torn era of the Naruto Warring States, carrying an iron staff and a lifetime’s worth of internal energy.
In this world, chakra runs rampant and ninjutsu is like demonic sorcery. He cannot see, does not speak the language, and has no one to rely on. Yet no one expects that the meridians in this aged body from another world share a natural origin with chakra pathways. He opens his meridians in a day, masters techniques in three, and makes a name for himself across the Warring States within a year.
Fire Style? He hears the wind and senses his opponent’s position half a step ahead. Genjutsu? Blindness makes him immune to every illusion. Sharingan? Rinnegan? To his ears, they are nothing but the noise of chakra flowing. When golden “heroic spirit” emerges from the fusion of internal energy and chakra, his iron staff becomes a weapon even Madara Uchiha must take seriously.
He turns down Hashirama Senju’s offer of the Hokage Position, saying only, “I won’t be an official. I’ll just be the gatekeeper.”
From then on, Konoha has a new clinic, the Hall of Compassion. Its blind old master teaches people to read, set bones, and identify herbs. He also teaches three children who will later become famous throughout the ninja world. From him, Tsunade learns the “Quake” technique of the iron staff, which she turns into her monstrous strength and Strength of a Hundred Seal. Jiraiya hears him speak of “the greatest heroes” and sets off in search of the Child of Prophecy. When Orochimaru asks him about the secret to eternal life, he simply replies, “It is because life ends that being alive feels like living.”
He has seen too much blood and fire in Konoha.
On the Night of the Nine-Tails, he holds Minato Namikaze’s body as his iron staff shatters the earth. On the night of the Uchiha massacre, after hearing Uchiha Itachi’s plan, he grips his staff until it cracks but does not stop him. He only says, “I don’t blame you, but I won’t forgive you.” Before Pain attacks the village, he goes alone to Amegakure and challenges the Demonic Statue of the Outer Path with a century’s worth of heroic spirit.