Two elderly Taoist priests, Chi Men and Dun Jai, who learn their magic from the same teacher always quarrel with each other. They provide mirth and expert kung fu tuition to young man who is mistakenly presumed to be the crown prince of the Imperial Court, missing since childhood. The emperor dispatches an 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.

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