Badges Of Fury 2013

When a spate of eerie murders erupts across HK two trouble-making cops are assigned to the case. Young maverick Wang and grizzled vet Huang, who is fed up with his reckless younger partner, always landing them in hot water. Reaching a dead end after discovering all the victims were former boyfriends of aspiring starlet Liu, the detectives must play a deadly game. One of them goes undercover as Liu's lover to lure the killer out.