A good hearted deed gets HOI Sum-kwai (Raymond Wong), the personification of the Happy Ghost, into a series of mishap.

• 善心的开心鬼化身康森贵（黄百鸣），误将一孕妇送错医院，令过气女歌星徐半香（张曼玉）之鬼魂错过投胎时间。