This story follows on from the events of 'Sir Percy hits back, ' by the Baroness Orczy After Percy and the League rescued Fleurette, only child of Armand Chauvelin, the Jacobins were overthrown, and Robespierre sent to the guillotine. Chauvelin, the cleverest member of the Committee of Public Safety, finds his many enemies see a way to get rid of him! Imprisoned, and expecting death, Chauvelin knows he cannot expect aid from the League of the Scarlet Pimpernel; but he still hopes. The pleas of Fleurette for the life of her 'Bibi' sends Percy and the League back to France. However, since one of the League, Jimmy Holte, meets with an accident, it is a younger Holte, Peter, or rather, Petronilla, who is placed as Chauvelin's keeper whilst Percy arranges an escape. Spending weeks together in hiding, this unlikely pair find much in common, and Chauvelin finds he comes to care for the vivacious girl. An unfortunate incident in which Chauvelin is recognised leads to danger, but Percy is impressed by the way Chauvelin places his trust in Percy's hands, as some of his own followers has failed to do. After the escape, Chauvelin places his skills at the disposal of the league, having become disillusioned by those in charge in France. He is not accepted by all the members of the league, and the angry and jealous manoeuvring of Armand St. Just places Peter into danger even in England.