Normandy 1850. A stagecoach drives along a road in the middle of the countryside. Inside, the passengers are all asleep except two men who are talking. Suddenly the coach stops: an axle has just broken. When one of the two men leans out of the window to see what is going on, his gaze lingers on the front a provincial abode, which seems to upset him. He soon starts remembering facts that took place forty years earlier...

During an orgy, Some old and wealthy notables are being murdered by a small group of leftist young revolutionaries. Very soon the police are tracking down Virgile Cabral, the leader of the group. Meanwhile, Virgile's brother and only relative, Vincent, a violinist (and a thief), comes back to Paris. They have not seen each other for three years. Vincent does not believe in the revolution. He only tries to live as he wishes to live. But by looking for his hunted down brother, he has no other choice than to be involved in a fight that is not his.