When Louis refuses to share his bed with her, Marie-Antoinette realizes that it will be more complicated than she imagined to bear the Bourbon heir. She turns to madame du Barry to get some help. But the favourite starts to perceive the Dauphine as a rival.

Marie-Antoinette and Louis are about to make their first official visit in Paris. Everything changes when the King falls gravely ill: succession to the throne suddenly becomes a concrete reality. On her side, Du Barry knows she must protect herself from the future Queen of France, or be subject to see her days numbered in Versailles.