Kuki Fumihiro is a son from a wealthy zaibatsu (conglomerate) family. His father raises him to become pure evil. Kuki kills his father to protect his adopted sister Kaori.
Afterward, Kuki disappears. He undergoes plastic surgery and takes the identity of Koichi Shintani. He watches Kaori and faces the great evil that exists within the Kuki family.
The movie is set in an aftermath of the sudden dispersal of a legendary town called "Mugen," and recounts the story of the five organizations, who aims to take control in the said area. These five organizations are known as Sanno Association, White Rascals, Rude Boys, Oya High School and Daruma Hooligans.
The five gangs will put their pride on the line as all of them take part in a fierce battle for dominance. However, the plot takes a surprising twist when a mysterious group called "Mighty Warriors" suddenly appears.
