Co-directors Felix Chong and Alan Mak jointly helm this relentlessly tense, heart-pounding thriller from Hong Kong, starring Eason Chan and Sammi Cheng. The premise concerns a policeman who must tread very carefully on both sides of the law when he is assigned to investigate the kidnapping of a young boy who just happens to be a triad boss's son - an assignment that effectively entails an allegiance between cops and crooks. ~ Nathan Southern, Rovi