In his strangest mission yet, the Pimpernel must rescue a young man accused of being the Pimpernel - and discover whether Chauvelin was behind a plot to plant the false avenger in France.

Sir Percy discovers that Chauvelin is blackmailing the banker Rothstein by holding his daughter, Rachelle, captive. He hatches a plan to fool the doctor treating Rachelle into unwittingly help her escape Chauvelin’s clutches and reunite her with her anxious father.

Innocent newlyweds, Antoine and Antoinette, are falsely arrested and sentenced to death. The Scarlet Pimpernel comes to the rescue with the help of Antoinette’s young sister, Elise, who worships the Pimpernel.