Ja Young (Choi Ji Woo) and Shin Hee (Park Sun Young) have spent much of their lives growing up together, but their friendship has always been unbalanced. Ja Young's father is a chauffeur for Shin Hee's family, so the two girls live in the same house and attend the same school, but Shin Hee always takes advantage of Ja Young to cheat on her exams. Though Ja Young experiences some setbacks in order to help her friend, she eventually gets into university and catches the eyes of the young and handsome Hyun Woo (Ryu Si Won), much to Shin Hee's jealous fury. One night, the three of them go out drinking, and a terrible car accident happens with Shin Hee at the wheel, leaving Ja Young, Hyun Woo, and a pedestrian seriously injured. With everyone else unconscious, Shin Hee switches Ja Young into the driver's seat to lay the blame on her friend...