Jackie Chan stars as Ah Keung, a cop from Hong Kong who comes to New York City to attend his uncle's wedding. He plans a little relaxation, a little sightseeing and little work at the family grocery store. But best-laid plans often go awry, and Ah soon lands at the center of a Rumble in the Bronx. Somebody forgot to tell Ah that the grocery store sits in the middle of the South Bronx, America's toughest 'hood... and ground-zero of a crime war. Now, caught between the mob and a ruthless motorcycle gang, Ah shows--after inflicting much pain on gangsters all around--that this seemingly average guy is a world-class daredevil and martial arts master.