A fantasy mystery romance in which the body of outsider Lee Sang Woo, who is falsely accused and hated by all students and the popular insider Gi Da Rim's body change. The story is set at a private institute with first years of high school. Sang Woo became gloomy because of a scandalous rumor, Da Rim is a top student and a good athlete, and she likes Ho Young. The three are the lead characters. Da Rim was dumped after confessing to Ho Young and by accident, her body was changed with Sung Woo.