Stéphane Bern tells the story of a duchess who should have become queen: the Duchess of Burgundy who became Dauphine of France but did not have time to reign. Or the true story of Marie-Adélaïde de Savoie, the mother of King Louis XV who was never queen.

What was the influence of this young girl at the court of Versailles? What was his relationship with Louis XIV? How did her contemporaries describe her?