Daigo Kagemitsu, who works for a Samurai general in Japan's Warring States period, promises to offer 48 body parts of his unborn baby to 48 devils in exchange for complete domination of the country. When the baby boy is born, Daigo has him thrown into a river, hoping the boy will die. A kind sage, however, finds him and adopts him. The sage fits out his poor son with prosthetics.