1. At the end of the Yuan Dynasty, Zhang Cuishan, a disciple of Wudang, and Yin Susu, the daughter of Tian Hawk's head, were involved in the dispute of killing dragons and drifted to a desert island with Xie Xun, the golden lion king. Zhang and Yin combined to give birth to a child named Wuji. 10 years later, Zhang Cuishan and his wife returned to China, but both of them were forced to commit suicide because of their relationship with Tulong Island.

2. When their son, Zhang Wuji, grew up, by chance, he learned the peerless martial arts of "Magic of Nine Yang" and "Great Move of Gankun" and became a master of Zoroastrianism. Zhang Wuji is indecisive. She deeply loves Yuan monarchs Zhao Min and Zhou Zhiruo, her cousin Li Yin and her maid Xiao Zhao. However, Zhou Zhiruo, who looks weak, is completely black.

3. In order to get the secret of the Dragon Slayer Island, Zhou Zhiruo killed Li Yin and framed Zhao Min. Although Zhang Wuji saw the true face of Zhou Zhiruo, she still couldn't give up. Later, Zhang Wuji resolved all kinds of grievances in the Wulin, resigned as the head of the team and went to Mongolia with Zhao Min, but he still hoped to make up with Zhou Zhiruo, Xiao Zhao and Li Yin.