Lan's mother is a witch doctor who disguises herself as a physician to treat patients. A mishap during her cultivation leaves her life hanging by a thread. Then war breaks out, and she is taken to the army to treat wounded soldiers, where she could die at any moment. By chance, the military doctor discovers that she is a witch doctor and reports the ancient legends about witch doctors to the general. The general decides to make her serve him and confines her, using both threats and persuasion. Worried for her mother's safety, Lan begins cultivating the art of gu to mount a rescue.
