The Classic WWII Romantic Thriller That Was Made Into the 1940s 

Film Noir Masterpiece Starring Barbara Stanwyck and Errol Flynn! 

After learning her husband is dead, Sandra Marshall visits his remote family estate to claim her inheritance. There, Sandra faces a cold reception from her husband's uncle, research scientist Mark Caldwell, who is also the administrator of his rather large inheritance. For some reason her husband had never told his uncle about their wedding and he accuses Sandra of lying about the marriage, but allows her to stay until he can verify her story.

However, her husband's teenage niece, Julie, welcomes Sandra with open arms. But soon tells Sandra that Mark is holding her prisoner and that strange things are going on in the sealed-off area of the mansion where he does his research. Julie also implies the other family members and servants are not telling the truth about the circumstances of Sandra's husband's death. Mark defends himself by saying Julie has an overactive imagination, leaving Sandra to wonder who and what she can believe. Sandra determines to find out for herself. Not realizing that in doing so she will become marked for murder by one of the most brilliant and scheming intellects she has ever encountered.