Who's the real chieftain of the dark streets? A melody of betrayal lingers in the street shrouded in darkness and madness.

Yokohama is a dark world controlled by drugs and gangs. Ryuichi Todo and Kanji Gojyo of the local yakuza group, Todo-gumi in Jinto Kai, are the last ones that live with their former leader. They've kept their traditional yakuza culture based on the heart of obligation, but the time's changed and the power balance between them has gradually changed. Yasuo Kuki in Goshiro-gumi schemes with his strong knowledge on business, while Kasai-gumi from Kansai tries to control Yokohama when the opportunity rises. A young man who became a yakuza, influenced by the yakuza mentality of Goshiro, has his soul stirred further when he meets Todo. What will he see in the violent world?