La Côte d'Azur, 1998. In the sun-dappled south of France, Emilie de la Martinires, the last of her gilded line, inherits her childhood home, a magnificent château and vineyard. With the property comes a mountain of debt and almost as many questions. Paris, 1944. A bright, young British office clerk, Constance Carruthers, is sent undercover to Paris to be part of Churchill's Special Operations Executive during the climax of the Nazi occupation. Separated from her contacts in the Resistance, she soon stumbles into the heart of a prominent family who regularly entertain elite members of the German military even as they plot to liberate France. After she inherits her childhood home, a magnificent chateau in Le Cote d'Azur, France, Emilie de la Martinieres realizes that it may hold secrets to her family's enigmatic past during World War II.