The story of Han Yi-joo, a woman who is in a contract marriage with a man named Seo Do-guk to get her revenge on her original husband. On the day of witnessing the betrayal of her husband Se-hyuk who confessed to her step sister, Yi-joo died in a car accident and was transported back to a year ago. She dreams of a secret perfect rebirth revenge through the contract marriage with the man who step sister loves to avenge her family, step-sister, and her husband who persecuted her.