More adventures with Sir Percy Blakeney and his crew as he uses ingenious disguises and tricks to rescue French aristocrats from the guillotine, and escape the cluthes of Robespierre. And a new challenge for Percy - Margueritte has died in childbirth leaving him with a baby daughter to look after.

The true identity of the Scarlet Pimpernel is threatened with exposure when a foppish young aristocrat is mistaken for Sir Percy.