A young cavalier, the Duke of Buckingham, and ambassador to the French court has just returned to England. He leaves behind two guardsmen, who he has instructed to stay near to the beautiful Queen Anne, with whom he has fallen madly in love. Queen Anne of Austria, wife of the jealous and morbid Louis XIII, has had a most lonesome and unhappy life, but now she is in constant fear of her enemy, the powerful Cardinal Richelieu, from whom she has tried to conceal her love for the young Duke...