张学友首次演红牌舞男，威名远播，警方扫黄组刑警林俊贤多次想扫荡他上班的牛郎餐厅均无功而回。不料新上任的女督察张曼玉性格刚烈，竟趁张学友出外远游时将牛郎窝砸烂。张回港后决定报仇，假扮成患绝症的画家亲近女督察，骗取她的感情，不料假戏真做，从此无法自拔。

Jackie (Jacky Cheung) is the owner of a very shady nightclub, which the cops are itching to shut down. But they haven't been able to catch Jackie red-handed yet due to his trickiness. When Jacky goes so far as to trick a female cop, Tammy (Maggie Cheung), into falling in love with him, the rest of the police force goes bananas, swearing to put an end to his nefarious activities at any cost. But is Jacky actually falling for Tammy and beginning to change his ways? Or is he already in too deep with the cops for that to help his situation?