In the quiet village of Carriveau, Vianne Mauriac says goodbye to her husband, Antoine, as he heads for the Front. She doesn't believe that the Nazis will invade France... but invade they do, in droves of marching soldiers, in caravans of trucks and tanks, in planes that fill the skies and drop bombs upon the innocent. When France is overrun, Vianne is forced to take an enemy into her house, and suddenly her every move is watched; her life and her child's life is at constant risk. Without food or money or hope, as danger escalates around her, she must make one terrible choice after another. Vianne's sister, Isabelle, is a rebellious eighteen-year-old girl, searching for purpose with all the reckless passion of youth. While thousands of Parisians march into the unknown terrors of war, she meets the compelling and mysterious Gäetan, a partisan who believes the French can fight the Nazis.