During the French Revolution, Englishman Sir Percy Blakeney is considered to be a terrible fop, completely unaware of the seriousness of the political situation abroad. In reality, Sir Percy is a hero to the French aristocrats and is known as "The Scarlet Pimpernel." His wife, Lady Marguerite, shares the opinion of most that Sir Percy is useless, until his heroism is proven when she discovers his secret identity. In Calais, Sir Percy is able to elude Chauvelin, a member of the new French government, even though Chauvelin threatens the safety of Lady Marguerite's brother, Armand St. Just. Lady Marguerite goes to Calais to aid her husband, and they finally are able to escape on a ship bound for England, assured of their love for each other.