Director Lanzmann spent six years simply looking for eyewitnesses of the Holocaust or as the Israelis name it: the Shoah. Most of those witnesses are Germans and Poles who either worked in the camps or observed what went on in them. The interviews are interspersed with sequences of the places where the deaths took place, not as they were but as they are now. Grass and flowers grow on the mass graves, the tracks on which the inmates were transported are still used by trains, and the concentration camps themselves look like disused factories.