"Ayin (Stephen Chow), a migrant worker in a fast food restaurant, met Ali (Liti Chung) who was studying Japanese karate in a martial arts training hall while delivering fast food one day, and fell in love with her at first sight. After being humiliated by Lin Guobin, a martial arts coach who also likes A Ti, A Yin, who feels that he is too weak, decides to worship Uncle Da (Ng Man-tat), who calls himself the "devil muscleman"..."