Lee Sun Yoo (Yoon So Yi) is training to become a nun. Right before she fulfill her wish, she found out that her older sister has passed away. Sun Yoo decided to take revenge on the man who is responsible for her sister’s death and gave up her dream of becoming a nun. She then meets Seo Ji Suk (Kwon se In), who is an immature man from a rich family. However, He changes his personality because of his love towards her.