He and his buddy Huang Fei Hong set out an investigation full of excitement and unexpected outcomes. Young detective Wang Bu Er, the police station's reckless buffoon, makes a shocking statement that this is a serial murder. . After discovering all the victims were former boyfriends of budding actress Liu, the two troublemaking cops one now posing as her lover are found in a mortal game to decoy the killer. In just 3 days, three cases of Smiling Murder disturb Hong Kong. .
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