In the gritty streets of Shinjuku in 1979, Akutsu Shouji, a member of the Kaeda Yakuza gang, faces humiliation after a defeat to a university cheering squad. This loss sets off a chain of misfortune in Shouji's life until a decade later in 1989, when a friend is tasked with ending his existence. In a desperate act, Shouji takes his own life, only to awaken back in Shinjuku in 1979, at the pivotal fight that altered his fate. Armed with a decade's worth of memories and growth, Shouji stands against the university students with newfound resolve and sagacity. Determined to change his destiny, he vows to don a distinctive gold emblem as he embarks on a fresh journey in life.