One day, body parts are found in a Paris canal. Although identification is made difficult by the missing head, it is possible to determine that the dead man is the coffee house owner Omer Calas. His widow, Aline, who is still attractive, seems strangely eccentric. Despite her denial, Maigret suspects that she already knows about her husband's death. Daughter Lucette, who works for a well-known doctor, also seems to know more. During his research, Maigret suddenly gets confessions from three people at once... Based on the 47th novel of the Maigret series: Maigret et le corps sans tête (1955), published in German translation under the title Maigret und der Kopflose and later in a new translation as Maigret und die kopflose Leiche.