Anne d'Autriche, born in Madrid to Philip III of Spain and Margaret of Austria, reigns as Queen of France. Her marriage to King Louis XIII was arranged to secure peace between France and Spain, ending centuries of conflict. This political union remains loveless, devoid of her genuine affection for the king. Her feelings reside with the Duke of Buckingham, though their unconsummated relationship requires strict concealment due to her position and the political climate.

As a Spanish-born queen in the French court, she endures intense suspicion and hostility from Cardinal Richelieu. He opposed the marriage alliance from the outset and persistently accuses her of espionage for Spain. This mistrust places her in constant peril, especially during heightened tensions between France and Spain. Her loyalties face perpetual scrutiny, and Richelieu's agents relentlessly monitor her actions.

Her role as queen consort is defined by isolation within the French court. The political nature of her marriage and Richelieu's influence over Louis XIII create profound emotional distance from the king. She navigates intricate court intrigues while maintaining secret communications, a necessity forced by Richelieu's accusations and the unending surveillance she faces.