At the end of the Yuan Dynasty, heroes emerged and the martial arts world was in turmoil. It was rumored that whoever obtained the Dragon Slaying Sword and the Heavenly Sword could become the supreme master of the martial arts world and command the world. For a time, the situation was very chaotic, triggering a fight for the Dragon Slaying Sword and the Heavenly Sword in the martial arts world, and several marriages and bad relationships were born from this. Zhang Cuishan of the Wudang Sect and Yin Susu of the Tianying Sect met and fell in love because of the Dragon Slaying Sword. In the end, they were forced to commit suicide by the upright people because of the Dragon Slaying Sword. When their son Zhang Wuji grew up, he practiced the peerless martial arts "Nine Yang Magic Skill" and "The Great Shift of the Universe" by chance and became the leader of the Ming Cult. Zhang Wuji had a lot of love with Zhao Min, the princess of the Yuan Dynasty, Zhou Zhiruo of the Emei Sect, his cousin Yin Li and his maid Xiao Zhao. However, Zhou Zhiruo, who seemed weak, was a complete "black-bellied woman". In order to obtain the secrets of the Heavenly Sword and the Dragon Slaying Sword, she did not hesitate to kill Yin Li and frame Zhao Min. Although Zhang Wuji saw Zhou Zhiruo's true face, he still couldn't let her go. Afterwards, Zhang Wuji resolved all the grievances in the martial arts world, resigned from the position of leader, and fled to Mongolia with Zhao Min.