Yoon Gab (Yook Sung-Jae) is a government officer and works within the palace. He has a good reputation and has a handsome appearance. One day, Yoon Gabs body becomes possessed by an Imoogi creature. Soon afterwards, people begin to talk about him as if he has lost his mind. The Imoogi that has possessed Yoon Gab is related to Yeo-Ri (Bona), whose first love is Yoon Gab.
