When a series of eerie murders erupt across Hong Kong, two troublemaking cops are assigned to the case. Young maverick WANG (Zhang Wen) is a reckless risk-taker, and grizzled vet HUANG (Jet Li) is fed up with cleaning up his rookie's messes. After discovering all the victims were former boyfriends of aspiring starlet LIU, the detectives (one now posing as her lover) are caught in a deadly game to lure the killer out.