In 1942, the Nazis come for a Jewish family living in the Montparnasse area of occupied Paris. In the chaos of their arrest, 11-year-old Josephine runs to the only person she can trust: her piano teacher, Andrée Levallois, a secret French Resistance operative. Andrée takes her in as a member of the family, spreading their rations and risking everything to keep her safe. But soon the authorities close in, and both Andrée and Josie are caught in a desperate race to stay alive.