The adventurer Jeanne de Valois-Saint-Rémy, descendant (by the left hand) of the king of France Henri II, and who claims to be "Countess de la Motte", imagines a tortuous plan to steal a magnificent diamond necklace that the queen Marie-Antoinette refused to buy from the jewelers Boehmer and Bassange.
as La comtesse Jeanne de la Motte-Valois
as Louis de Rohan
as Le comte Nicolas de la Motte
as Marc Rétaux de Villette
as Marie-Antoinette
as Cagliostro
as Boëhmer
as L'abbé Loth
as Louis XVI
as Deschamps
as Camille Desmoulins
as Le procureur Joly de Fleury
as Maître Doillot
as Maître Target
as Le premier président d'Aligre
as Monsieur de Soubise
as La duchesse de Polignac
as La princesse de Lamballe
as Le bijoutier Bassange
as L'avocat général Séguier
as Le bailli de Suffren
as Le duc de Villeroi
as Nicole, la fille Oliva
as La reine Marie-Antoinette
as Un geôlier (uncredited)
as (uncredited)
as (uncredited)
as Le comte d'Artois (uncredited)
as Un membre du Parlement (uncredited)
as Hubert (uncredited)
as (uncredited)
as (uncredited)
as Un page de la reine (uncredited)
as M. de Breteuil (uncredited)
as (uncredited)
as Maître Breton (uncredited)
as Un huissier (uncredited)
as (uncredited)
as Un abbé de cour (uncredited)
as La femme Hubert (uncredited)