Society believes the worst of Justin Alastair, the notorious Duke of Avon who is clearly proud of his sobriquet, "Satanas". It is he who buys Leon body and soul from a scoundrel in a Paris backstreet. The red-headed urchin has strangely familiar looks and should play a fine part in Justin's long-overdue schemes to avenge himself on the Comte de St Vire - until that is, Leon becomes the ravishing beauty Leonie . . .
