Lee Hyerin got everything a girl could've ever dreamed; appealing beauty, brain, nice body figure and talents. She's got a really great voice and her vocal is beyond powerful and when she dances, the dancing floor is hers. And of course she won't let her talents go to waste when she signed up to be a singer at a well-known company. As expected, the company promised to give her the job but on one condition; she has to be a substitute backup dancer for one of the most popular group in Korea, SS501.

Things started to get ugly when two guys from the group begin to fall for her. One guy was really sweet towards her but the other one had been a real pain in the since the first moment they met. And when she found out that her mom's death was somehow connected to the company's president, she knew that she had to forget about love and vowed to avenge her mother's death.