The Scarlet Pimpernel

At the heart of the French Revolution, effete aristocrat Sir Percy Blakeney is secretly the Scarlet Pimpernel, leading an underground group dedicated to freeing nobles from the brutal Robespierre. Blakeney plays his part so well that even his own wife, Marguerite, doesn't suspect him. Robespierre's agent, Chauvelin, learns that Marguerite's brother is one of the Pimpernel's group, and she begins working unknowingly to destroy her own husband.