A man and a woman agree to pretend to be a couple for an upcoming high-society dinner to please the man's mother, who values appearances. He warns her not to reveal her true background and demands they keep their relationship strictly an act, agreeing only to hold hands publicly. Meanwhile, a costly birthday gift is arranged to impress influential guests. As the woman arrives home and reunites with her aunt, the couple prepares to face the family event, but the true challenge remains: maintaining their false roles without exposing their real lives after the party ends.