Three years into her marriage, Shen Zhiyi discovers that she has only ever been a substitute for her husband Gu Huaixu's first love. Heartbroken, she files for divorce. Only then does Gu Huaixu realize he truly loves her and repeatedly tries to win her back, but his lingering attachment to his first love continues to hurt Shen Zhiyi. After finally securing the divorce, Shen Zhiyi decides to give up on romance and focus on her career—until her mysterious and ruthless former fiancé, Jin Xizhou, suddenly reappears and boldly pursues her.