La horse

When he discovers his grandson, Marx Porel, has two hundred milion francs worth of heroin, Jean Gabin destroys it. When the criminal for whom Porel has been holding it comes and demands the drugs and the man, and threaten his family and farm. Gabin shoots him, hides the body, sinks the crook's car in the swamp and sticks his grandson in the potato cellar. His cattle are stampeded and killed, his barn is burnt. Gabin gives his orders but no explanation to his family and workers, despite the police taking an interest.

This being a Gabin film, I was never in any doubt as to how it would turn out. Indeed, the idea of a multi-billion dollar mob of criminals going against Gabin is soberly funny. Gabin is quite believable as the stiff-necked, autocratic proprietor of a family farm in Calvados, just as he is in everything.