14-year-old Aggie, a newly arrived immigrant working as a domestic, is tormented by her trouble-making sister and an overbearing housekeeper. Luckily, Aggie is soon befriended by a rich, young, idealistic girl named Rose who convinces her to dress like a lady and attend a dance at the Palais Royale. Rose's brother falls for Aggie, but her deceptive appearance hides the truth about her social class and sets her up for heartache.