For more than twenty years, Diane de Poitiers was King Henri II's favorite. Despite her strong character and her legendary beauty, Diane is just another courtesan and her position remains fragile. And Henri's upcoming marriage to Catherine de Medici may jeopardize her dreams of domination. Diane will do anything to maintain her influence. But can her passion with Henri, twenty years younger than her, which is key to her power, really last forever?