In his last British film before taking off for Hollywood, James Mason returned to the kind of brooding figure that female audiences had adored in The Seventh Veil and Odd Man Out. He's the brilliant brain surgeon who concocts an elaborate revenge on the shrewish figure responsible for the death of the married woman he loved. The murderess is played by Pamela Kellino (Mason's wife, who co-scripted) while his great love is Rosamund John. The plot is heavily contrived, ie ridiculous, but Mason's performance and Lawrence Huntington's directorial flair keep one hooked.

A neurosurgeon relates to his students in medical school a story about an affair he had with a married woman and how after the affair was over, the woman fell out a window and died. The surgeon, suspecting that she was murdered, set out to find her killer -- but, instead of turning the suspect over to the police, he planned to take his own revenge on the murderer.