In January 2003, the Berest family receive a mysterious, unsigned postcard. On one side was an image of the Opéra Garnier; on the other, the names of their relatives who were killed in Auschwitz: Ephraïm, Emma, Noémie and Jacques. Years later, Anne sought to find the truth behind this postcard. She journeys 100 years into the past, tracing the lives of her ancestors from their flight from Russia following the revolution, their journey to Latvia, Palestine, and Paris, the war and its aftermath. What emerges is a thrilling and sweeping tale based on true events that shatters her certainties about her family, her country, and herself.