During the Qin and Han Dynasties, Wei Wang, a military officer, led his troops to the Western Regions where they engaged in fierce battle with bandits in the desert. They rescued an incredibly beautiful woman named Xiaowei and brought her back to the Jiangdu王府. Unbeknownst to them, this Xiaowei was actually the "Nine Skies Beauty Fox" in disguise, wearing a human skin. To maintain her human form, she required the nourishment of human hearts. Therefore, Xiaowei's invisible assistant Xiaoyi, a demon transformed from a desert lizard, would kill people every few days to extract their hearts as offerings to Xiaowei, expressing his love for her. As a result, the city of Jiangdu fell into terror. Xiaowei also developed feelings for Wei Wang due to his bravery and handsomeness. Using her witchcraft, she attempted to seduce Wei Wang and take the place of his wife, Peirong. Peirong discovered Xiaowei's infatuation with her husband and sensed that she was not an ordinary person. Thus, she secretly sought help from Pang Yong, a highly skilled wandering swordsman, and Xia Bing, a pure-hearted demon slayer, to rescue Wei Wang... And so, a complex web of emotions, temptation, betrayal, resistance, and life-and-death battles between humans and demons slowly unfolded.