A recent widow has invited a group of family friends to her large and secluded country home. However, what the guests don't know is that the reason they've been assembled is that their host suspects one of them might be her husband's killer and she's intent on uncovering the identity of his murderer.
The Sienese Pia Tolomei is imprisoned in a castle by a jealous husband. Based on the novel by Marguerite Yourcenar, inspired by a story from the Italian Middle Ages.
The innkeeper Barnabáš and the teacher Isidor Slovíčko succumb to the lure of old Moreles, to whom the young Taussig sends enthusiastic letters from America.
It is 1905. The police director gets Jindrich Legenda (Eduard Cupák) shadowed as, yet Legenda had served his sentence for a burglary, the jewels have not been found.
Paris, 1888. With the help of forensic medicine, a sensational criminal case is uncovered. The chief of the Paris Sûreté, Inspector Goron, with the help of Lyon University Professor Lacassagne, is able to solve a capital crime that seemed unsolvable according to the methods of forensic science at the time.