Robert Hossein, Marina Vlady, Robert Le Beal. A brilliant "little" spy film. Hossein and Vlady play mysterious characters who meet up one night in a lonely cabin in the wilds of Normandy. They are both spies, but whom do they work for-the Allies or the Nazis.

The evil knight Torchesac, who is at the service of the sinister lord of La Mortaille, gets a very powerful magic flute and uses it for evil purposes. Johan and Pirlouit, assisted by the magician Homnibus, travel to the land of the Smurfs, the only manufacturers of this sort of instrument, to get a new one and battle the usurpers.

From April to July 1794, Robespierre forms a triumvirate with Saint-Just and Couthon. He plans to instate his ideal based on virtue and in times of revolutionary crisis, on terror. In May, he establishes the Cult of the Supreme Being. However, he still has numerous enemies...

Set in the countryside of Provence, the film is based on three tales from Alphonse Daudet's 1869 short story collection Letters from My Windmill: "The Three Low Masses", "The Elixir of Father Gaucher" and "The Secret of Master Cornille".