Troub/emaking cops are assigned to the case After a spate of eerie murders erupts across HK two. Young maverick Wang along with vet Huang who's completely fed up with his partner that is reckless putting them into water. Reaching a dead end after detecting the sufferers were former boyfriends of starlet Liu, the detectives must play a deadly game. One must go under cover as the lover to lure the killer out of Liu.