Adopted by middle classed parents, Yoona has always had a dream to be an heiress. Finally, her dream becomes reality. Yoona discovers that her biological grandfather, Lee Soo Man,is the head of a prestigious aristocratic family. After being kidnapped by their family's enemies and after many years of searching, he finally finds his long lost granddaughter.

As she starts her life as an heiress, everyday is filled with excitement. However, everything seems a bit different from what she had imagined it to be. In the family, there are 4 candidates named Donghae, Jiyong, Eunhyuk and Sungmin, one of whom will become the successor of Emp. The succesor will be the one who she'll marry.

Characters:

Yoona - the long lost granddaughter of Lee Sooman.

Lee Sooman - called Emp. (means emperor)

Donghae - one of the succesors, older brother of Eunhyuk

Jiyong - one of the succesors

Eunhyuk - one of the succesors, younger brother of Donghae

Sungmin - one of the succesors