Shinjuku Kabukicho, Asia's largest entertainment district. Gangsters and the Chinese mafia are vigilantly targeting the town's huge concessions. One day, Detective Kumada, who belongs to Section 4 of the Shinjuku Chuo Police Department's anti-gang team, receives information that a bomb has been planted somewhere in Kabukicho...

When Masaki find themselves at a bar owned by his friend Akemi and ponder the recent strange happenings. He later accepted a proposal from his old rival Hattori and join the Todo-gang. A member, Hazama, beeing jealous over Masakis high rank and starts planning ways to get rid of the newcomer from the gang.