Joe is betrayed by his gang (lead by Cheung Kwok Chu), who then set out to kill him. On the run, he forcibly enters the apartment of Ann. Despite being initially scared, Joe departs on fairly friendly terms, and catches up with Ann again the next day at her work (she's a children's ballet teacher). One of Ann's students is Sweetie, whose father Mr Fung dotes on her. Fung, a jeweller, is also being romantically pursued by one of his employees, Elsa. The following day, Joe's old gang rob Fung's jewellery shop, during which time they snatch Sweetie. Fung pursues the villains just long enough to see one of them (Billy Chow) throw Sweetie out of the car, to her death. Distraught, Fung charges down to the police station, only to find that them little better than the Keystone Cops. So he follows Joe around, pleading with him to form a partnership to kill the crooks. In the meantime, Joe and Ann go through lots of boy-meets-girl stuff. The remainder of the action is mainly the changing dynamic between Fung and Joe.