A man loses everything to people he trusted, then spends decades learning to kill with the hand he has left. The animation moves like calligraphy, every frame of violence is deliberate, beautiful, and it costs him something. By the time he understands who actually destroyed his life, revenge has already destroyed who he was.
A legendary carpenter loses everything in a single moment of betrayal: his right arm, his father, his life as he knew it. Decades later, Jingoro returns to the world transformed. His missing limb replaced by a devastating mechanical weapon, he moves through Edo with singular purpose alongside his enigmatic partner, a cat that sleeps through chaos. The underworld knows him only as "Hidari",the Left Hand,and they fear what that name means. Revenge guides every step until Jingoro discovers the truth that shatters his assumptions: the Tokugawa Shogunate orchestrated his downfall. The threads of conspiracy pull him deeper into a nightmare of clockwork soldiers and shadowy conspirators. But conspiracy turns to catastrophe when the very castle he once rebuilt awakens as a weapon designed to annihilate the city itself. Hidari must choose between hunting his enemies and saving the innocents caught in the crossfire. With only one arm, a cursed prosthetic, and time running out, he races against a weapon the size of a fortress to stop an apocalypse born from his own tragic past.