Inspector Maigret is called one morning by his nephew, Paul Vinchon, inspector at the Belgian border at Jeaumont who asks for his help in a complicated murder case: the killing of Otto Braun, a Jewish banker from Stuttgart. Until Maigret gets there, a man carying a large sum of money in securities is arrested and brought to Jeaumont. He tried to run away from the train. Maigret questions the other passengers to find out more about his seating arrangement in the cabin.
The situation gets more complicated as a woman, Lena Leinbach appears and the scene. Thus, the inspector finds out that Otto Braun had been fleeing Germany with as much money as he could carry, as the National Socialists had taken over. Braun had given Lena the money and supplied her with a luggage with a false bottom so that she could pass the money at the border check. The question is now: did the woman have a part in revealing the German's secret and having him killed or was she innocent?
This report prepared by Dana Samson