Master thief Chow Kwan-hai is the only person who knows the location of a stash of valuable pearls. With the help of a mismatched gang of criminals, assassins and pickpockets, Chow leads a suicidal mission to the Bloody Mill to find the treasure and hopefully make it back alive.

Des patriotes Ming ont caché leur butin dans un vieux moulin dans un coin de Chine. Les Ching voudraient bien le récupérer et envoient leurs espions partir à sa recherche.