In the early 1990's, a tractor mechanic from China nicknamed Steelhead illegally enters Japan to search for his girlfriend. To make ends meet, he joins his friend in Shinjuku in doing menial labour. Steelhead finds out that his girlfriend has married Eguchi, a Japanese Yakuza leader. Steelhead decides to stay on in Japan and work for Eguchi as a hitman. Soon, Steelhead gets used to the power and finds himself embroiled so deeply in the ways of the underworld that there is no turning back.
