This film is an evocation of the Nazi concentration camp system, the perfect incarnation of racial hatred and contempt for man. Nacht und Nebel - N. N. - Night and Fog. It was by these words, whose menacing mystery appealed to their imagination, that the nazis designated a certain category of deportees - resistance fighters or people of 'impure' race - considered particularly dangerous and therefore doomed to quick extermination in the concentration camps.