Shinji and Masaru spend most of their school days harassing fellow classmates and playing pranks. They drop out and Shinji becomes a small-time boxer, while Masaru joins up with a local yakuza gang. However, the world is a tough place.

The story follows a trio of Japanese youths of Chinese descent who escape their semi-rural upbringing and relocate to Shinjuku, Tokyo, where they befriend a troubled Shanghai prostitute and fall foul of a local crime syndicate. Like many of Miike's works, the film examines the underbelly of respectable Japanese society and the problems of assimilation faced by non-ethnically Japanese people in Japan.