Kinderblock 66 is the story of four men who, as young boys, were imprisoned by the Nazis in the notorious Buchenwald concentration camp and who, sixty-five years later, return to commemorate the sixty-fifth anniversary of their liberation. The film tells the story of the effort undertaken by the camp's Communist-led underground to protect ad save Jewish children who were arriving in Buchenwald toward the end of the Holocaust. Kinderblock 66 also tells the story of Antonin Kalina, the head of the block who was personally responsible for saving 904 boys in Buchenwald.