A former tennis star plots wife-murder.

Margot Wendice wants to divorce her husband Tony. However, that would be his ruin. So he decides to kill Margot. But the motive and the perpetrator would be too obvious. So he persuades Mr. Lesgate to do the deed for him while he is in a club and thus has a perfect alibi. The plan: Lesgate should go into hiding, Tony calls, Margot answers and Lesgate strangles the woman from behind. Said and done. But then something goes wrong: Margot stabs her appointed murderer in self-defense with scissors.—Ulf Kjell Gür