Female lead is the daughter of the richest man, but pretends to be a cleaner for her boyfriend, and secretly brings him great benefits. When the female lead thinks that her boyfriend is going to propose to her, she discovers his betrayal. The betrayed female lead reveals her identity but is ridiculed and disbelieved, at this moment the male lead stands up for the female lead and says he will marry her. After they get married, no matter how the female lead expresses her identity, she will be suppressed, but in the end, these people who suppress the female lead and the male lead will be punished. In the end, the female lead who has successfully proved her identity and the male lead who has been guarding her fall in love and stay together for the rest of their lives.