In Rome, Chen Ching-hua and her uncle Wang experience trouble with their restaurant from a crime boss who wants their property. When Chen refuses to give it up, the boss sends gangsters there to scare away the customers. Appealing to an uncle in Hong Kong, Chen receives help in the form of a young martial artist, Tang Lung. On his first arrival he is disoriented by his new surroundings and appears to be nothing but a country bumpkin. Disappointed, Chen asks what help he can be, but Tang confidently assures her that he is capable enough. At the restaurant, Tang learns that the staff have begun to learn karate, much to the annoyance of Quen, an employee who favors Chinese Kung Fu. Tang advises Quen to be open-minded and make use of anything that works...