The hero, a martial arts prodigy, lives a low-key life in the city, but he gets involved in an underground martial arts dispute because of his protection of the female protagonist. The heroine possesses the secret key to ancient martial arts, attracting the covetousness of all major forces. In order to protect his beauty, the male protagonist uses his fists to break the order of the underground world, setting off a martial arts craze in the modern city, and finally reveals the shocking secret of the female protagonist's life experience and the decline of martial arts.
