At the dawn of the Second World War, Ines is the young wife of Michel, owner of the House of Chauveau, a small champagne winery nestled among rolling vineyards near Reims, France. Marrying into a storied champagne empire was supposed to be a dream come true, but Ines feels increasingly isolated, purposely left out of the business by her husband; his chef de cave, Theo; and Theo's wife, Sarah. But these disappointments pale in comparison to the increasing danger from German forces pouring across the border. At first, it's merely the Nazi Weinfuhrer coming to demand the choicest champagne for Hitler's cronies, but soon, there are rumors of Jewish townspeople being rounded up and sent east to an unspeakable fate. The war is on their doorstep, and no one in Ines's life is safe-least of all Sarah, whose father is Jewish, or Michel, who has recklessly begun hiding munitions for the Résistance in the champagne caves. Ines realizes she has to do something to help.