Two elderly Taoist priests, Chi Men (Leung Kar Yan) and Dun Jai (Yuen Cheung Yan), who learn their magic from the same teacher always quarrel with each other. They provide mirth and expert kung fu tuition to young man (Yuen Yat Chor) who is mistakenly presumed to be the crown prince of the Imperial Court, missing since childhood. The emperor dispatches a eunuch with the magic powers to apprehend the young man. But he must first deal with Chi Men and Dun Jia who are the young man's protector.