In a 1970s Japan, where violence and the struggle for power intertwine in a decaying society, a veteran underground boxer is forced to confront his tumultuous past. When his sister is kidnapped by a dangerous criminal gang, he plunges into the dark world of crime to rescue her. As he delves deeper into this underworld, he uncovers the darkest secrets of his own family and his rivals in the ring, who are willing to do anything to ascend the criminal hierarchy.
Alongside his desperate mission, the protagonist bears the weight of a personal rivalry that haunts him: an old gym buddy, now turned relentless enemy. His journey is filled with spectacular fights, ruthless rivalries, and an internal struggle that confronts him with the question of what it truly means to be a champion. The story explores redemption, loyalty, and the fight to overcome the ghosts of the past.
With each blow, a series of events unfolds that will test not only his physical strength but also his determination and ethics. The film becomes an emotional rollercoaster, where love and sacrifice collide in an explosive climax. In this journey of self-discovery, the line between good and evil blurs, leaving the audience on the edge of their seats until the very last minute.