Cradle 2 the Grave

High action from Jet Li. The plot is a little complex, but goes something like this: a crook steals a horde of black diamonds, which bring Li into the picture as a cop. He's after the diamonds, and also his ex partner, who has kidnapped the diamond thief's young daughter in an attempt to get at the diamond. So the cop and the crook find themselves on the same side after the same man, and the usual martial arts theatrics follows...