On the eve of their wedding, JOHN and ANNE were struck by an unknown vehicle, resulting in JOHN's unfortunate death and ANNE's miscarriage, leaving her nearly devastated. After being discharged from the hospital, she unexpectedly encounters XU WENBIN's wife, MEIXIU, and their son ZIZI, who happened to need a nanny to take care of her son. ANNE moves into the WENBIN mansion and fantasizes about one day replacing MEIXIU as a mother. MEIXIU, who has a heart condition and cannot engage in intense activities, uses ANNE’s body to rekindle her relationship with her husband by giving him a night with ANNE as a wedding anniversary gift. This sows the seeds of a tragic crisis, as MEIXIU’s status at home is threatened; even her husband and son turn towards ANNE. MEIXIU blames ANNE for not following the rules of the game and drives her out of the house. However, WENBIN does not forget ANNE and continues to secretly indulge in an affair with her, planning to escape together. Just as WENBIN is on the brink of losing everything, ANNE remembers the license plate number of the vehicle that killed JOHN and meticulously plans revenge by bringing WENBIN to JOHN’s cemetery, setting a trap for him.