This tale of intrigue finds Valentina Cortese involved in an assassination plot. She helps the police apprehend the conspirators after an innocent bystander is accidentally killed.

Bedelia Carrington is living happily, it appears, in Monte Carlo with her husband Charlie Carrington. But a cultivated young artist, Ben Chaney, begins probing into her past with curious concern. Chaney, who is really a detective, learns that Bedelia's obsession for money has led her, in the past, to husband-poisoning for the insurance money.