During the Jiajing period of the Ming Dynasty, when Japanese pirates were ravaging the southeastern coast, rumors spread that the "Cangming Sword Jue" created by Qi Jiguang, a famous anti-Japanese general in the former dynasty, had reappeared in the world. This secret book that combines the art of war and martial arts has attracted various forces to compete, and it has also been implicated in the unsolved martial arts case of the "bloodbath in Hanshan" twenty years ago. Young swordsman Yun Zhan gets involved in a dispute to find out the truth about his master's murder. He travels with the mysterious woman Shen Qingheng. During the pursuit and interception by imperial spies, Japanese ninjas, and martial arts sects, he gradually uncovers a shocking secret that can subvert the martial arts world.
