Description：The Southern Song Dynasty was a period when humans and demons were indistinguishable. Monk Fahai (played by Zhao Wenzhuo) conquered demons everywhere, and also disturbed the two snakes, Bai and Qing, who were practicing at the bottom of the West Lake. Qing (played by Maggie Cheung) was rescued by Bai (played by Joey Wong), and the two called each other sisters. The two sisters were deceived and pretended to be adults and lived among the people. Bai married the honest scholar Xu Xian, and Qing also fell in love with Xu Xian at the same time, so she often seduced Xu Xian with her coquettish manner, but Xu Xian only loved Bai. Bai opened a pharmacy, thinking that she could live a stable life from then on, but Xu Xian could not stand Qing's teasing, and discovered the true identity of the two snakes, Qing and Bai, but he was reluctant to leave his beautiful home. Fahai learned the whereabouts of the two snakes, Qing and Bai, and even captured Xu Xian. It turned out that Bai gave up cultivating a positive result for love, and she was pregnant. In order to save her husband, the two snakes fought with Fahai.