Queen Anne of France is in dire peril. She has given her diamond necklace to her lover, the Duke of Buckingham and now the King has insisted that she wear it at a forthcoming ball. Cardinal Richelieu, ever the Queen’s enemy, has dispatched his most feared agent the Lady de Winter to steal the necklace and doom the Queen. She calls on you, her brave Musketeers, to fly to England, retrieve the necklace and return before the ball or she will be ruined and all of France will fall into chaos.