Cossacks help four French musketeers deliver the casket of the daughter of the Persian Shah with tulips to the Dutch prince so that he can marry her. The prince (the son of the stängalter) is the nephew of Anna of Austria, therefore the French court takes the most active part in the fate of the Dutchman. The insidious Cardinal Richelieu, who planned to marry the prince to his niece for the sake of the state interests of France, wants to disrupt the Queen's plans and, at the head of the guards devoted to him, sets off in pursuit of the musketeers.