wo hopeless housebreaker brothers, Ah Chi and Fatty (Nat Chen and Wong Jing), steal a diamond that had already been earmarked by a criminal gang. Through a series of unfortunate and - frankly - unlikely events, the diamond ends up in the shoe of a rising star TV actress Cheung Man Ju (Maggie Cheung). They pursue her all over Hong Kong until finally tracking her down at a charity ball where (you guessed it) she must leave by midnight, and accidentally loses a shoe in the process.

Overview from themoviedb.org