Two brothers, Hsaio and Wu Cheng, are searching for their uncle in the restaurant that they mistakenly think he owns. Finding out too late that he doesn't and unable to pay their bill, they are besieged by the thugs that run it. When the twosome are able to fight the gang off, their skills are recognized by the crooked owner, King Chan, who hires them and offers to assist in finding the missing relative. The uncompromising application of authentic fighting techniques established this film's reputation for being one of the bloodiest in the genre.