Hye Jung is an uncivilized 16-year-old girl who finds her life miserable and nothing worth living (her mom died when she was little), so she never tries in school and always acts impolitely and violently towards others. Her father leaves her for her grandmother to take care of her. Until she accidentally bumps into a man (Ji Hong) while she steals a CD, and later he moves in her grandmother's house and becomes her teacher at school, her life has completely changed. He discovers that she is intelligent and he tries to keep her back on track. Her grandma wants her to have a good career, and she now believes in her successful future, so she tries to achieve her dream of being a doctor.