One night in a New York hotel, airline pilot Jed Towers gets the air from his chanteuse girlfriend Lyn Lesley. Meanwhile, the Joneses, guests at the hotel, need a baby-sitter, and elevator operator Eddie recommends his shapely niece Nell. Jed sees Nell through his window, gets acquainted, and becomes increasingly aware that this disturbed, spooky woman is the last person Mrs. Jones should have entrusted with her daughter.