The one-eyed swordsman Tange Samanosuke receives a secret order from his lord, Daizen no suke: to steal the cursed twin blades, Kenunmaru and Konryumaru. He risks his life to seize Kenunmaru, losing his right arm in the process. Saved by the fugitive Ofuji, he is reborn as the one-eyed, one-armed warrior-Tange Sazen. Soon, the turmoil reaches Town Magistrate Ooka Tadasuke.