Hardworking Geum Jan Di (Ku Hye-sun) 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, Gu Jun Pyo (Lee Min-ho), Yoon Ji Hoo (Kim Hyun-joong), So Yi Jung (Kim Bum), and Song Woo Bin (Kim Joon) 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's leader Jun Pyo, bringing hell along with her. The proud and persistent Jun Pyo falls hard for feisty Jan Di, but she shares a connection with the quiet, sensitive Ji Hoo. Through Jan Di's encouragement, Ji Hoo goes abroad to join his model girlfriend Min Seo-hyun, and in his absence, Jan Di and Jun Pyo grow closer. Jun Pyo and Jan Di slowly begin to fall in love. Soon Jan Di realizes that it is Jun Pyo that she truly loves, not Ji Hoo. But numerous difficulties arise, threatening their relationship. Jun Pyo's mother, a cruel and selfish businesswoman, who is also the President of Shinhwa group, disapproves of Jan Di's lowly upbringing and tries her best to split them up. And newly single Ji Hoo returns to Korea, prepared to declare his feelings for Jan Di.Many obstacles in their relationship, but there is also true love blossoming between these two young hearts Jun-pyo & Jan-di. Will their love survive?