September 1792. The Austro-Prussian coalition invades France, Verdun falls and the road to Paris is opened, the Revolution appears lost. Danton, Minister of Justice, tries a ploy: to steal the Crown Diamonds kept at the Hotel Garde-Meuble and buy the Duke of Brunswick, commander of the Prussian army. Theophile, viscount of Chandrilles is then contacted by an alleged baroness close to the king, she asks him to seize the diamonds in order to free the royal family held at the Prison of the Temple. The latter resolves to accept the mission and strives to form his group of marauders among aristocrats .