Ricky is sentenced to prison for the pulpy murder of a lowlife responsible for his girlfriend's suicide. In the dystopian future of 2001, the prison system has been privatized and run by monsters far worse than the criminals they keep locked up. Ricky finds himself up against the Gang of Four, super-powered martial artists who rule the various prison blocks and assist the warden with his illegal opium operation. Ricky's innate sense of justice sends him into battle, forcing him to punch his way through one monstrous opponent after the other, literally! Action choreographed by Shaw Bros. legend Phillip Kwok!