The Paladines write crime novels together. In a cinema, they happen to see a report on the consequences of a shipwreck in which Lieutenant Dupuis tells about the death of an old man in the lifeboat carrying the survivors. Husband and wife agree that this could be the starting point of a new story and go and see Dupuis to get more details about the drama. When they come to his hotel Dupuis is dead with a bullet in his head. Police characterizes the death as suicide but Paladine has found a train ticket in the dead man's pocket. With his wife he takes the train to the specified destination, somewhere in the provinces...

At the end of the last century, in the Cévennes, a valiant officer was taken for a brigand. Brought to defend himself, he kills one of his attackers and seeks refuge in caves where he hides and from which he no longer dares to come out. The devotion of a doctor saves him and he marries the daughter of this one.

Bastien and Furet are a journalist and a photographer working together as a team on the newspaper 'L'Echo du Jour'. Just as they are about to go off on a weekend break with Micky, their boss's secretary, they are sent to a crime scene to report the murder of a Russian named 'le Moujik'.