Set against the backdrop of World War II in Nazi-occupied France, the story follows two sisters, Vianne and Isabelle, as they navigate the harrowing realities of war and occupation. Vianne, the elder sister, is forced to make difficult choices to protect her family while her husband is away fighting. Meanwhile, the rebellious and spirited Isabelle joins the French Resistance, risking her life to fight against the oppressors. Through their separate yet intertwined journeys, the sisters discover the strength of their bond, the resilience of the human spirit, and the sacrifices required for freedom and survival.