Kim Tan (Lee Min-ho) is a handsome and wealthy heir to a large Korean conglomerate who is sent to study abroad in the United States. In reality, it is a form of exile, as his elder half-brother, Kim won (Choi Jin-hyuk) schemes to take over the family business. While in the States, Kim Tan bumps into Cha Eun-sang (Park Shin-hye), who has arrived from South Korea in search of her older sister. Slowly, he finds himself falling for her, never realising she is the daughter of his family’s housekeeper.
When Kim Tan’s fiance, Rachel Yoo (Kim Ji-won), arrives to bring him back to Korea, his heart is torn between love and duty. Meanwhile, Kim Tan’s former best friend, Choi Young-do (Kim Woo-bin) goes to the same school as Kim Tan and Eun-sang and starts falling for Eun-sang as well. Troubles arise as the heirs realises the difference between money and real world.
高中生車恩尚是個打工狂人，她與單親媽媽相依為命，過著黯淡的日子，是個不折不扣的“貧窮繼承者”。金歎是韓國首屈一指大企業帝國集團的繼承人，長相帥氣，身世顯赫，生來便擁有一切，然而他是個私生子，被同父異母的哥哥視為眼中釘，“流放”到美國留學。 為了找姐姐，恩尚獨自來到美國，發現姐姐風光的生活全是謊言 ，在夢想崩潰之時，恩尚意外遇到了金歎。經曆了哭笑不得的事件後，金歎把無家可歸的恩尚帶回家。隨即金歎的未婚妻闖上門來，自此，灰姑娘與王子公主們結下一段孽緣。 命運的齒輪持續轉動，恩尚和金歎的相遇沒有終止在美國。回到韓國後，恩尚轉學到富家子弟雲集的帝國高中，高智商壞公子崔英道，財閥大小姐李寶娜，這些令人羨慕的18歲繼承者們逐一登場。