The main heroine of the novel is the daughter of the legendary Count Cagliostro, possessing many of her ancestor’s skills. A seductive beauty, she is consumed by a passion for scams, adventures, and thefts. In pursuit of treasure she is joined by the brilliant swindler and elusive criminal Arsène Lupin. The gentleman burglar is ready at any moment to begin his own game, if not for his fatal love for the countess.