Directed by Richard Webb
In London 1952, the wealthy Margot Wendice has convinced her professional tennis player husband, Tony, to give up playing to spend more time with her. He now sells sports equipment and, to Margot, their life together is a happy one.
However, he has discovered while on a tennis tour in the United States several years ago Margot had an affair with an American murder mystery writer name Max Halliday.
Because he wants revenge as well as her money, Tony meticulously plans Margot’s murder. She has no idea that Tony knows of her past affair, nor does she have any suspicion that he is planning to kill her. Max comes to London to visit the couple, and Tony uses this as an opportunity to fulfil his plan.
Tony blackmails a man who calls himself Captain Lesgate, a former schoolmate and convicted criminal, to carry out the scheme. They plan what they believe is the perfect murder.
But when Margot refuses to play the part of the victim, things go very differently…