The soul of 18-year-old Kang Gyung-Joon becomes transplanted from the torso of Seo Yoon Jae. Seo-Yon-Jae is a doctor and Gil Da-Ran that is engaged to senior school teacher. Gil so is the teacher of Kang Gyung-Joon. More problems ensue when Seo Yoon Jae that is 30-year-old drops deeply in love with another female.