Kang Ji Eun, a poor teenager, joins a prestigious university due to her outstanding smartness and gets herself in trouble with the current leading student of their department Dianne Lee. Ji Eun is also in search of her long lost older sister Lee Sae Eun where they were separated when they were still little because of a car accident that killed both their parents. Ji Eun then meets two handsome men, Kim Mingyu, the snob heartthrob in school and Jeon Wonwoo the cold looking yet warm hearted person when you get to know.