Nagurimono plot
Two yakuza gangs fight for a monopoly on a new kind of drug that English businessman Mr. Vincent can supply them with. To prevent further bloodshed, Mr. Vincent proposes to the gang leaders to hold a martial arts tournament where the winner can distribute the drugs for him. The leader of one of the gangs, 'Pistol' Aijiro, is fond of a new, all-permissive fighting style and has his loyal Lieutenant Anrai recruit fighters for the tournament. Anrai, however, never steps into the ring himself. Then Anrai sees Mr. Vincent with a prostitute in whom he recognizes his childhood friend. Now there is more at stake for him.