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…

Ryūichi and his small gang of Triad vie for control of the Japanese underworld in a crime-ridden Shinjuku quarter while Detective Jojima tries to bring it down.

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…