Keung, a cop from Hong Kong, comes to his uncle in America for the wedding. The uncle has just sold his supermarket to a beautiful Chinese woman, without saying a word to the new owner about the fact that bandits want the store. Keung, of course, stands up for a lovely business lady and fights the racketeers. But the exploits of the Asian cop in New York neighborhoods do not end on that! Keung begins the tough opposition to gangsters in the case of the missing diamonds.