Choi Kang-Chi ( Lee Seung-Gi) is legendary gumiho that is half human and half animal. He struggles to live his life as a human and also falls in love. ... Seo-Hwa (Lee Yeon-Hee) is the daughter of a noble family, but her father is branded a traitor by Jo Gwan-Woong (Lee Sung-Jae) and beheaded in front of her. Afterwards, Seo-Hwa and her younger brother Jung-Yoon (Lee Da-Wit) are handed over to a gisaeng house. Seo-Hwa refuses to become a gisaeng or enter the house. She is then tied to a tree for 3 days before passing out from exhaustion. Meanwhile, Koo Wol-Ryung (Choi Jin-Hyeok) is a spirit protector of Jiri Mountain and possesses eternal life. Koo Wol-Ryung is also full of curiosity and wanders around the human world. One day, he sees Seo-Hwa tied to a tree by the gisaeng home and becomes interested in her. Seo-Hwa is unable to watch her younger brother being beaten because of her. She finally succumbs and agrees to become a gisaeng. She then learns she will have to spend the night wi...