Athos, Porthos, Aramis, and D'Artagnan—the four musketeers—find themselves caught between conflicting loyalties. Deep inside the Bastille, a young prisoner called merely "Philippe" has languished for eight long years, completely unaware of his real name or the nature of his crime. But Aramis knows his secret—a secret so dangerous that it could change the face of the French monarchy and topple the King from his throne! Will Aramis' cause divide the once indivisible band of musketeers? A tale of mystery, adventure, and political intrigue, this conclusion to the musketeer saga is based on the true story of a masked prisoner who dwelled in the Bastille during Louis XIV's reign.