A London woman is blackmailed after killing a man who tries to rape her. Anny Ondra plays Alice White who, while having dinner in a fancy English nightspot with her husband-to-be, Scotland Yard Detective Frank Webber (John Longden), flirts with an artist (Cyril Richard) seated at the next table. The artist invites her up to see his studio and she goes but balks when the artist asks her to pose in the nude. When the request becomes a demand, Alice stabs him to death. She rejoins her fiance and tries to forget the murder but her conscience keeps bothering her. To make matters worse, sniveling rat Tracy (Donald Calthrop) materializes to blackmail Alice for the crime.