Princess Fengyi (Tianxin) of Nanping is about to marry Meng Tao (Shao Feng), the King of Xiaoyao of Hou Shu. Who knows that the ceremony is imminent, but both of them flee, and Fengyi takes away the national treasure "Langdao". After Fengyi left, civil strife broke out in Nanping, and General Yang Silu (Li Fei) killed the King of Nanping in an attempt to usurp the throne. However, in order to ascend the throne, one must first obtain Langdao. After learning the whereabouts of the national treasure, Yang Silu sent a master of the inner court to find the whereabouts of Fengyi. By chance, Fengyi and Meng Tao met without knowing each other's identity, and they were accompanied by a knight named Yin Jian (Wang Bing). As time went on, Fengyi gradually fell in love with the daring Meng Tao, while Yin Jian chose to bury his feelings for Fengyi in his heart, accompany Fengyi, and wait silently. When he learned of Fengyi's true identity, the cowardly Meng Tao chose to leave. At the same time, the fierce killer and the moment were getting closer and closer to Fengyi.