A Hong Kong police officer (Jackie Chan) falls into some nested international intrigue with childlike grace in this joyous action movie directed by Stanley Tong. Something about the hero’s unpretentious transition from vulnerable bumbler to brilliant dispatcher of bad guys in every action sequence remains irresistible despite the repetition, while the fights he winds up in carefully finesse the distinction between gritty action and violence-gilded dance. The plot is silly and distracting, but this romp is an enchanting expression of Chan’s persona—the scene where he cuddles a koala isn’t just consistent with his character’s demeanor, it’s defining.