The show begins by the trip of both Cha Eun-Sang (Park Shin-hye) and Kim Tan ( Lee Min Ho) to the States, where each one of them has come from a completely different background and for an absolutely different reason. For Cha Eun-Sang, her trip was supposedly to deliver some money to her sister who is to get married to a foreign man. Being from a poor family, Cha Eun-sang finds this sum of money too large and valuable (her poor mom’s life savings) to simply transfer it via banking. Accompanied by her dream to visit the enchanting States, she decides to deliver the money to her sister in person.
On the other hand, Kim Tan was facing some kind of banishment in the States; being the son of a mistress, his half brother Kim Won – who assumes that Kim Tan is seeking to inherit their father’s company and properties – pushes Kim Tan over forcing him to leave for the States under the pretext of receiving a better education.
The plot gets rhythmical when Cha Eun-Sang and Kim Tan meet and then fall for each other. On their return to South Korea, Cha Eun-Sang is shocked when she discovers that her poor mother is a stay-in maid at Kim Tan’s family residence. The shock to Kim Tan was a double as he knew his father would disapprove of and do his best to demolish their relationship.
To put his son’s choices and will to test, Kim Tan’s father Kim Nam-Yoon sends the maid’s daughter (Cha Eun-Sang) on a welfare scholarship at the same school where Kim Tan (and the majority of the elite society boys and girls ) goes. The couple witness a lot of conflicts caused by their social-class differences and by the desire of both Rachel ( Kim Tan’s fiancée – who is engaged to Kim Tan for merely promoting their father’s business), and Choi Young-do ( Kim Tan’s best friend and rival) who has fallen for Cha Eun-Sang – to sabotage this “outrageous” relationship.