At the end of the Yuan Dynasty, Zhang Cuishan, a disciple of Wudang, and Yin Susu, the daughter of the master of Tianying Sect, were involved in the fight for the Dragon-Slaying Saber. Together with Xie Xun, the Lion King with Golden Hair, they drifted to an uninhabited island at sea. Zhang and Yin became a couple and had a son named Wuji. Ten years later, Zhang Cuishan and his wife returned to Central China, but due to their connection to the Dragon-Slaying Saber, they were forced to commit suicide, leaving behind their orphaned son, Zhang Wuji.