Julie de Mortemar, the ward of Cardinal Richelieu, is in love with Adrian de Mauprat, a soldier of fortune. Louis the Thirteenth is in love with her himself, as is also his favorite, Count de Baradas. Cardinal Richelieu, in order to protect his ward from the King, marries her to de Mauprat. Under the influence of Baradas, King Louis issues an order for the annulment of the marriage and demands that she return to court. Baradas conspires with Gaston, Duke d'Orleans, a brother of Louis the Thirteenth, to dethrone the King and murder his prime minister, Cardinal Richelieu. Baradas poisons de Mauprat's mind against Richelieu and induces him to join in the conspiracy against the King. The conspirators attempt to murder Richelieu. De Mauprat enters his chambers at night, but he meets Richelieu, who proves to de Mauprat that Baradas has lied to him in showing that the Cardinal was de Mauprat's enemy. The conspirators are at the door to murder Richelieu, but the Cardinal and de Mauprat trick ...
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