The action begins under Queen Anne of Austria regency and Cardinal Mazarin ruling. D'Artagnan, who seemed to have a promising career ahead of him at the end of The Three Musketeers, has for twenty years remained a lieutenant in the Musketeers, and seems unlikely to progress, despite his ambition and the debt the queen owes him. By chance, however, he is summoned by Mazarin, who requires an escort, as the French people detest Mazarin, and are on the brink of rebellion (La Fronde). D'Artagnan is s