This story is the last adventure of the three musketeers, Porthos, Aramis and Athos and their companion D'Artagnan. The year is 1661. While Louis XIV sits on the throne of France, his twin brother, Philippe, is prisoner in the Bastille, the terrible prison in Paris. Louis is not a good king and the story tells of a conspiracy to end his reign and make Philippe the King of France. Will conspirators succeed?