Set in medieval France, this story continues the tale of the three musketeers. Many years after their exploits, the musketeers are well established in society. We see Aramis, who is a bishop now, meeting a prisoner. However, there is no confession to be heard. Aramis is at the root of a conspiracy that could change the course of French history. The fact that the prisoner is the twin brother of the King of France has sealed his fate and destined him to spend the rest of his life in prison. But Aramis has a different plan in mind. Being one of the few to know the prisoner's identity, Aramis conspires to replace the King of France with his twin brother, with the idea that the prisoner will be a better ruler for France. How will this plan turn out? Will Aramis succeed? When the other musketeers find out about the plan what stand will they take? To find out, read this classic tale of love, politics and loyalty.