Returning home from boarding school for the Christmas holidays, Bab finds herself treated as a little girl while the family concentrates upon the impending wedding of her older sister Leila to Carter Brooks. To remedy the situation, Bab seizes upon a photograph of a matinee idol and invents her own suitor, Harold Valentine. Brook recognizes the photo and induces the actor to present himself to Bab as Harold Valentine. When he appears at her door during a party being thrown in her honor, Bab, bewildered and frightened, decides that her sole means of deliverance lies in the recovery of her letters from the actor's apartment. Leaving the party, Bab blunders into his apartment, sets off a burglar alarm and is arrested. She is taken home and after learning her lesson, is promptly sent back to boarding school.