Matsudo leads a normal life working in the futures market. But after receiving a promotion, he loses consciousness. He finds that he has become part of some wicked human experiment. As the scalpel is slowly inserted into his brain, he loses his past memory and even control of his body

Onimasa is the egocentric boss of a small yakuza clan on Shikoku Island, whose criminal duties conflict with his self-image as a chivalrous samurai. His struggles with his boss, the Shikoku Godfather, and the tumultuous life of his adopted daughter, Matsue, form the backdrop of this epic tale of justice, obedience, and bloody vengeance.