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.

Giving one of Sir Percy's agents false information, Chauvelin hopes to lure the man he thinks is the Pimpernel into the open. He achieves his aim but is astonished when a 'simple minded' farmer's boy (the Pimpernel in disguise) arrives.