 A martial arts expert (Blanks) who runs a dojo for under-privileged kids from a dilapidated warehouse is shaken down by gangsters demanding protection money. Then when one of his students (Bonneau) is gunned down in the street by the gang, he swears revenge. Meanwhile the gang leader (Akiyama) is setting up a deathmatch between the best fighters and is forcing a former trainer (Mako) to find a new champion by threatening his granddaughter.