Years ago, Toshihiro's father was betrayed and murdered by his own yakuza clan. With his father gone, Toshihiro was taken in by Hotaru, an old friend of his father's who trains him to fight and join the police agency. Now, as a member of the agency, Toshihiro seeks revenge on his father's killers, unaware that his own brother, Akira, is on the other side, part of the very gang that toshiro is trying to destroy