The four Musketeers are back in action, though in differing capacities and in a politically altered world. Cardinal Mazarin is still plotting evil schemes, while King Louis XIV believes himself to be in love. Unfortunately, Raoul, the son of Athos and the Vicomte of Bragelonne, feels the same for the lovely Louis de la Vallière. D'Artagnan soon encounters a confusing stranger, and in turning to his friends, he discovers Athos' desire to restore Charles II to the throne, as well as the covert efforts of Aramis and Porthos to find a masked prisoner in the fortified island of Belle-Ile. D'Artagnan must travel with all haste in and out of the countries of Europe to alter the fate of many of those very nations, proving himself yet again worthy of his beloved station and sacred honor.