After the sudden death of her husband, the young widow Su Wan'er could not bear the loneliness for long nights. She met Liu Rufeng, a poor scholar who looked exactly like her ex-husband. The two of them each got what they needed, she provided for him to study and take exams, and he provided her with warm companionship. While playing and singing every night, Wan'er always calls other people's names by mistake when she is deeply in love. The scholar asked aggrievedly, and she blurted out: "Among the three of them, you are the second." In one sentence, a shocking secret was revealed - it turned out that besides her deceased husband, there was a third person she was thinking about. As the scholar investigates step by step, a story about revenge, stand-in and true love slowly unfolds... When the stand-in starts to resist, and when the stand-in wants to become a regular, what will be the outcome of this transaction that started in bed?
