The story of the chief prosecutor Dr. Klapka - a self-confident, cold-blooded, calculating man who lives in the comfort befitting his position - and his attractive wife. Dr. Klapka sues the factory owner Muller for murdering his brother and, years ago, his mistress for selfish reasons. The prosecutor has no direct evidence and must rely only on his oratory skills to propose the maximum sentence. In his desperate attempt to win the trial, he grabs at every straw. In this case, such a straw is a mysterious exotic stranger with alleged clairvoyant abilities to read the writer's character from a manuscript just by touching it with his fingers.