Shen Qianqian's daughter suddenly fell ill and was hospitalized. She tearfully begged her husband to come to the hospital, but he coldly said he was busy with work and hung up. When she returned home to get her bank card, she unexpectedly discovered the "gift" her husband had prepared for her—an affair. Shen Qianqian hated her own weakness, not even having the courage to open the door and confront him. Determined to save her marriage, she decided to get close to the mistress and take revenge. Meanwhile, Li Fei'er, completely unaware that she had become the other woman, was devastated when she found out the truth. Furious and betrayed, she chose to team up with Shen Qianqian to ensure Lu Huai left the marriage with nothing. Thus, Shen Qianqian and Li Fei'er embarked on their journey of exposing the cheating scumbag while gathering evidence to take him down.