Saburo Shiba, a young man who spends his youth idle, is furious when he learns that Akao, who once deprived his father of his sight in a foul, took responsibility and left the boxing world, had set up a boxing gym. Akao's son, Kenji Akao, a thoroughbred boxer, stands in the way of Sabu, who has come to interfere with the Akao Gym match. Sabu challenges Kenji to a fight, but is defeated by Kenji's American-style boxing. He seeks revenge and tries again in kickboxing, but is defeated again. After losing both in a fight and in kickboxing, Sabu began boxing seriously under the supervision of his former boxer father. Meanwhile, he meets Kenji's younger sister, Akao Katori. Hitori starts a ruthless scheme to destroy Sabu, who is burning with revenge, but...? A youthful action romance of a man who lives for love and fistfighting!