During the French Revolution, a mysterious English nobleman known only as The Scarlet Pimpernel (a humble wayside flower), snatches French aristos from the jaws of the guillotine, while posing as the foppish Sir Percy Blakeney in society. Percy falls for and marries the beautiful actress Marguerite St. Just, but she is involved with Chauvelin and Robespierre, and Percy's marriage to her may endanger the Pimpernel's plans to save the little Dauphin

18th century English aristocrat Sir Percy Blakeney leads a double life. He appears to be merely the effete aristocrat, but in reality is part of an underground effort to free French nobles from Robespierre's Reign of Terror.

Sir Percy is forced to return to France one last time, to rescue his wife from the clutches of the sinister Robespierre. It's clearly a trap, but nothing will keep the good Pimpernel from carrying out his mission.