A weekend at a marquis’ country château lays bare some ugly truths about a group of haut bourgeois acquaintances.
A man and a woman arrive in a cafe-hotel near the Belgian frontier. The customers recognize the man from the police's description: his name is Amedee Lange, and he murdered somebody in Paris. Lange was an employee in a printing works. His boss was a real bastard, swindling every one, seducing female workers... One day he fled to avoid facing his creditors, and the workers set up a cooperative to go on working. What then made Lange a killer?
Paul Braconnier and his wife Blandine only have one thing in mind: to find a way to kill each other without risk. After listening to a radio show, Paul decides to go to Paris to meet a famous lawyer in the acquittal of the murderers. He tells the lawyer that he killed his wife. The lawyer asks Paul to reconstruct the circumstances of the drama. Without knowing it, he explains, in spite of himself, the way for Paul to murder his wife by putting the odds on his side to avoid death penalty or even be released...
