In the vibrant district of Ikebukuro, Makoto Majima, renowned as the skilled mediator between rival factions, operates amidst a tapestry of businesses and gangs. His alliance with the formidable G-Boys, under the leadership of the charismatic Takashi Andou, ensures a delicate peace in this bustling Tokyo neighborhood. Yet, the arrival of the Red Angels, a new rival group encroaching on G-Boys' territory, sparks immediate tensions. Surrounded by adversaries within and outside his circle, Makoto's path through the city grows increasingly treacherous. As he tackles various conflicts, he gradually uncovers a sinister scheme that threatens to plunge Ikebukuro into a devastating war.