《我的公主》讲述了原本是平凡女大学生的女主人公某一天突然成为公主，与出身韩国最大财阀家族的外交官相恋的故事。宋承宪在该剧中将饰演韩国最大财阀家族唯一的继承人，有着俊秀外貌的外交官-朴海英与金泰熙饰演的李雪上演了一场浪漫爱情故事。

        Lee Seol (Kim Tae-Hee) is a woman who enters college later than other girls. Like her peers, they dream of becoming a princess someday somehow. Despite, no one expects that Lee Seol has actually becomes a real life princess in Korea. From then on, she met Park Hae-young (Song Seung-heon) a handsome diplomat who has been selected to become her etiquettes instructor. In the beginning, Hae-young is being very displeased with Lee Seol as his grandfather has decided to give up all of his assets which suppose to be inherited to him to support Lee Seol of becoming the princess. However, as they spent longer time together Hae-young starts to fall in love with Lee Seol…