On the cold battlefield of the Kingdom of Rain, the orphan "Ashes" awakened from his corpse, leaving only the obsession to save his critically ill sister burning his soul. Being brought back to Konoha by Orochimaru and Tsunade, this false sanctuary of peace could not bear the madness of his return home. He took the initiative to embrace Konoha's deepest darkness - its roots, and honed it into a sharp blade in Danzo's shadow, while spying on Orochimaru's forbidden knowledge. Only the medical ninja Senju Rena, like the glimmer of light penetrating the abyss, became the only emotional tie and source of pain in his cold world.
In order to gain the power to tear apart time and space, Ashes tramples on everything. He rebelled against Konoha, desecrated the dead, delved into the filthy soil to reincarnate, and formed an army of the undead. Forming a fragile alliance with Madara Uchiha in the abyss, he transformed into an "undead controller" that horrified the ninja world. He hunted tailed beasts with extreme ruthlessness and efficiency, setting off a bloody storm that swept the continent. In the flames of war, Reina's tears and faith were the only torture of his humanity.
When Madara's world-destroying plan was launched, Ashes betrayed him brazenly, just to seize the ultimate energy. At the moment when the time and space channel opened, he returned to his homeland with his body on the verge of collapse and his hands full of sins. What awaited him was his sister's cold, empty bed - what he had spent and burned everything in exchange for was a desperate late arrival. The power backfired, the soul withered, and the ashes scattered in front of her sister's grave. The only memory left was Reina's vague smile under the sun, which became the last and most painful remnant of this dark journey home.