Chan and Yuen Biao play two lunch-truck restaurateurs who are trying to make a living selling egg rolls and hamburgers in the busy squares of Barcelona. Hung is a novice private investigator searching for a beautiful pickpocket named Sylvia (Lola Ferner) whose thieving teams her up with Chan and Yuen. Sylvia is kidnapped after she discovers she is actually a wealthy heiress, and that's when Chan, Yuen, and Hung join forces to free her and kick some bad guys' butts.