In her previous life, she was an unlearned and unskilled apprentice of the Immortal Medicine Sect. After learning that her parents died at the hands of the Immortal Medicine Sect, she finally woke up and swore to become a human master. From then on, she devoted herself to studying medicine without eating or sleeping, but secretly turned against medicine and practiced poison. Later, Shen Cangyu inherited the position of the sect leader and made her an immortal. The top disciple of the medicine sect was killed by the strange poison Duhunsan because Mu Yan was jealous of her relationship with Shen Cangyu. Shen Cangyu died trying to save her, and the traces of his poisoning were discovered by Mu Yan, so he was charged with murdering his master and practicing poison against medicine. He was stripped of his bones and ordered to be executed. After rebirth, she took to water like a fish in water, becoming a poisonous woman and developing a pair of ghostly eyes. He is also the palace doctor. Finally, he discovered that Shen Yang was the reincarnation of Shen Cangyu, so he tried every means to cure him. In order for him to agree to assassinate the emperor with the master of the Palace of Hundred Ghosts, he failed in the end and discovered a huge secret. In the end, she used up all her poison skills and became a mortal woman, staying with Shen Yang in the human world forever.
