Forty-four survivors, deported to Auschwitz as young adults from Greece, Poland, Germany, Belgium, Romania, Hungary and France, describe the world they lost before the numbers were tattooed on their arms. The film builds its account from their testimony rather than from the camp alone, tracing childhoods in the 1930s, the tightening restrictions on Jewish life under Nazi occupation, and the moment deportation orders arrived at each family's door. First-person interviews are combined with archive footage and animated reconstructions that fill in scenes no camera recorded, from crowded transit points to the trains themselves. Each survivor also carries the story of relatives who did not survive, so the film functions as a composite record of communities across an entire continent rather than a single biography. Historians and researchers appear alongside the survivors to place their accounts in context. The result is less a history of the camp than a history of the people it was built to destroy, told by those who happened to live.