The first shock delivered by this engrossing documentary is probably the queasy jolt of recognition. Hans Jürgen Höss, the now elderly son of the Nazi Auschwitz commandant Rudolf Höss (who was executed in 1947), is taken to see his childhood home: the wartime house with its “paradise flower garden” just next to the camp, where the Höss family lived their grotesquely placid and innocent existence, all unaware – or so they said – of what was going on just over the wall. This is the house and garden re-created in detailed replica not far from the original site by film-maker...