Xu Banxiang (Maggie Cheung), a ghost who was a former singer, predicted that a pregnant woman would give birth in a certain hospital, and planned to reincarnate as a new person. However, the pregnant woman was sent to the wrong hospital by Happy Ghost (Raymond Wong), who transformed into a high school teacher, and Xu Banxiang missed the chance to reincarnate. To vent her hatred, Xu Banxiang began to find ways to tease Happy Ghost. The worst time, she possessed the female monitor of Happy Ghost's class (Fennie Yuen), causing her to run to a nightclub and make a scene. As a result, a group of hooligans who were having fun in the nightclub were arrested, and Happy Ghost was innocently implicated. Xu Banxiang was both proud and worried, but Happy Ghost used love to influence her. Seeing that everyone was happy, the hooligans who had been released from prison came uninvited.