Paris, 1975. Sifting through condolence letters after her mother's death, Camille finds a long, handwritten missive that she assumes came by mistake. But every Tuesday brings another installment from a stranger named Louis, a man separated from his first love, Annie, in the years before World War II. But also awaiting her discovery is the other side of the story, and Camille soon realizes that her own life may be the next chapter in this tragic story.