The Li family has made a living by walking darts for generations, and the owner of the village, Li Zhentian, obtained the long-lost method of the Li family - 'Dragon Roaring Nine Heavens'., the Escort has gradually become the top Escort in the Jianghu - Longxing Escort in his own hands. Li Zhentian has two wives. The first wife is Ouyang Lan, the daughter of Ouyang Jian, the head of the Zhuren Sect, and the other is when he was walking the Escort.Zhou Qingti, the daughter of an official he rescued. The two had a son each. The eldest son Li Longzhan was born to Zhou Qingti. The second son Li Fanyu was born to Ouyang Lan. Li Zhentian preferred Ouyang Lanxin and the second son Li Yu. During a family visit,Ouyang Lan was killed in order to protect her son Li Yu, and Li Yu's temperament changed drastically. In order to find the murderer who killed her mother, she always looked like a playboy in front of others, but secretly practiced martial arts in order to find the murderer who killed her mother and serve as her mother.revenge.