Wealthy Peter Sterling and his younger wife Christine have an existence of little excitement so when a stranger comes into their lives, she is intrigued. An affair turns into much more and they are soon plotting to rob Peter of a precious gemstone.
Peter Sterling
Christine Sterling
Detective Mills
Doug Mitchell
Sibyl Anderson
Miss Stevens
Young Man
Mrs. Coolidge
Mum
Junior Secretary
Freddie
James
Sir Henry
Doug's Girl
Old Lady
Station Assistant
