It is said that he who wears the No. 1 headband shall rule the world. It is also said that only he who wears the No. 2 headband may challenge the No. 1. Years ago, a swordsman who wore the No. 1 was brutally slain by a power-hungry gunman named Justice. The swordsman's son witnessed the murder, and has grown up to become the cold-hearted Afro Samurai. Afro has honed his skills with a single purpose in mind. With the No. 2 band around his forehead, Afro sets out to give Justice his due.