A poor female student signs a contract with an evil master to save her seriously injured boyfriend. Five years later, she works as an urban white-collar worker during the day, but at night she has no choice but to surrender to his domineering attitude. She was originally in peace and contentment, just waiting for her boyfriend to wake up and regain her life. Unexpectedly, he ordered her to clean up the mess of his one-night stand... Love grew in hatred, love was fettered by torture, and she fell every step of the way. When she gathered her emotions and accepted the confrontation, his real lover returned across the ocean... When the truth was revealed, she realized that she was not only a substitute, but also a pawn for his revenge. She was devastated by the cruel reality again and again, and was told that the instigator of her boyfriend's car accident was actually...