Patrick Modiano opens Dora Bruder by telling how in 1988 he stumbled across an ad in the personal columns of the New Year's Eve 1941 edition of Paris Soir. Placed by the parents of a 15-year-old Jewish girl, Dora Bruder, who had run away from her Catholic boarding school, the ad sets Modiano off on a quest to find out everything he can about Dora and why, at the height of German reprisals, she ran away on a bitterly cold day from the people hiding her. He finds only one other official mention of her name on a list of Jews deported from Paris to Auschwitz in September 1942.