Louis may now be King, but Marie Antoinette is determined to launch her reign as the Queen of France. However, as her political advice is ignored and Provence and Joséphine threaten to deliver an heir, a chill sets in the royals' marriage.

Antoinette's brother Joseph comes to Versailles to save the marriage, but realizes he will have his work cut out in uniting this estranged couple, still childless after seven years. Time is running out to save the Franco-Austrian alliance.

Marie Antoinette is pregnant at last, but her reputation is attacked when pornographic pamphlets challenging the legitimacy of her unborn child appear at Versailles. The castle is locked down and an investigation takes place in order to uncover the traitor.

Louis becomes increasingly confident in his position as King as he throws himself into supporting the American War of Independence. Marie Antoinette spends her time at the Petit Trianon where she begins to fall for a familiar face.