D'Artagnan and his Musketeer comrades thwart the plans of Cardinal Richelieu to usurp King Louis XIII's power.D'Artagnan and his Musketeer comrades thwart the plans of Cardinal Richelieu to usurp King Louis XIII's power.D'Artagnan and his Musketeer comrades thwart the plans of Cardinal Richelieu to usurp King Louis XIII's power.