This drama is about two girls, Jin Sun Mi (Chae Rim) and Heo Young Mi (Kim So Yeon). Sun Mi had a nice childhood and grew up with lots of love from her father. Young Mi's mother left her when she was young and her father was a drunk who recently died. She had a hard childhood but never gave up and made it into college

The story focuses on the conflicts between the young teachers and the problems that high school students have. Jang Yi San is a timid and incompetent classical music teacher who has to teach the only daughter of a highly dangerous mob leader. Eun Byul is the mob leader's daughter and she is also a new student at MyungMoon High but knows nothing whatsoever.