Jackie Chan plays an undercover cop who solicits the help of his gang of childhood friends--the five Lucky Stars, each of whom specializes in petty crimes and minor mishaps--to help him catch Japanese gangsters. Dough-faced Eric Tsang replaces John Sham as one of the Lucky Stars, while Sibelle Hu plays the femme du jour and the object of the Lucky Stars' lust. The film features several notable fights, including a surreal sequence in which Chan rumbles in an outlandish amusement park costume; in another memorable fight, director Sammo Hung battles in a yellow jumpsuit, à la Bruce Lee's GAME OF DEATH. The fantastic showdown at a haunted house attraction pits the Lucky Stars against a stellar cast of opponents: Hu versus Nishiwaki, Hung versus Lau Kar-wing, Yuen Biao versus Lam Ching-ying, and Chan versus Dick Wei.