Troub/emaking cops are assigned to the instance, when a spate of eerie murders erupts across HK 2. Grizzled vet Huang who is completely fed up with his reckless partner and young maverick Wang always putting them in water. Reaching a dead end after discovering the victims were former boyfriends of starlet Liu, the detectives must play a deadly game. Some of them must go undercover as the enthusiast of Liu.