Two decades have passed since the musketeers triumphed over Cardinal Richelieu and Milady. Time has weakened their resolve, and dispersed their loyalties. But treasons and strategems still cry out for justice: civil war endangers the throne of France, and in England, Cromwell threatens to send Charles I to the scaffold.

The quartet of musketeers come out of retirement to cross swords with time, the malevolence of men, and the forces of history. But their greatest test is the titanic struggle with the son of Milady who wears the face of evil.