During high school, Sarah had a crush on her music teacher as did her classmate. When she finds out that the classmate has a very special relationship with the teacher, she tries to poison herself but fails. As a college student, she seduces her friend's fiance Joon. Her friend dies from a deliberate car collision after she finds Joon and Sarah together. Jun and Sarah's relationship develops rapidly but Sarah, feeling overwhelmed, leaves him for R, a designer. Jun warns Sarah to stop seeing R and Sarah, convinced of Joon's love for her, tries to break things off with R. But at a cabin in the mountains, R refuses to let her go.