Hardworking Geum Jan Di attends the exclusive Shinhwa High School by a scholarship she gets because of an incident. She finds her shallow, privileged classmates unbearable, especially the notorious F4. Rich, handsome, and arrogant, Goo Jun Pyo, Yoon Ji Hoo, So Yi Jung, and Song Woo Bin are the kings of the school and no one, not even the teachers, dare challenge them. No one, that is, except Jan Di. Angry at their rudeness, Jan Di tells off F4 leader Jun Pyo, bringing a world of trouble upon herself. Although Jun Pyo persists on bullying her, he begins to find himself attracted to Jan Di.