Ten years ago, her mother had been been murdered during the clumsy surgery, leaving her orphaned. And, ten years later, Park Jiyeon becomes a doctor at the hospital her mother has been murdered. There, she meets a son of her mother's murderer, Yoo Seungho. 

Jang Wooyoung and Lee Jieun were childhood friends. Now, they're rivals. They complete at everything. But, the situation changes when Jieun's crush starts dating the popular child actress Park Jiyeon. But, how will the situation change really?