Manji, a swordsman without morals and blessed with immortality, grows tired of the countless lives he has ended. His only talent being that of killing, he concocts a plan to regain his mortality. He proposes to the witch who cursed him to eliminate one hundred wicked men for every virtuous person he has slain. The witch accepts his terms and sends Manji on a journey to defeat one thousand malevolent individuals. Along the way, he encounters Rin, a young girl seeking vengeance against the sword school that brought her family to ruin. Rin and Manji join forces, but their pursuit of retribution places them in constant peril. Amidst their unquenchable thirst for revenge, they must also evade the grasp of vengeance to survive and find peace.