A Duc's daughter learns her rescuer killed her brother and betrays his plan to save the queen.

The film takes place in Paris, 1793, during the Reign of Terror following the start of the French Revolution. Paul de Roulade (Pedro de Cordoba) is a hero to the Proletariat, who cry him 'Citizen de Roulade'. One evening he gets into an argument with the Vicomte de Marny over the virtues of a dancing girl; this leads to a fight (provoked by the viscount), forcing Paul to kill the nobleman. The viscount's sister Juliette de Marny (Flora le Breton) swears revenge: to achieve this, she infiltrates the de Roulade household and beguiles Paul into falling in love with her. It is revealed that Paul has secret Royalist sympathies and, wary of the bloodshed, he decides to smuggle Marie Antoinette out of France. To do this, he enlists the aid of none other than the Scarlet Pimpernel (Holmes Herbert).—Wikipedia