In 1940 the nazis initiated a gigantic bunker construction programme for the Reich's capital Berlin. The programme was intended to convey the impression of security, since nobody considered air raids a realistic scenario - a fatale arrogance of the rulers. Of the more than 1.000 bunkers merely a fraction can still be seen today. The film shows the underground bunker labyrinth of Berlin and recounts how the people in the shelters struggled to survive.
Eye witnesses like Waltraud S., then a 15-year-old school girl, the doctor Gertraude Gerlach and Rochus Milch, switchborad operator in the Führerbunker, remember the oppressive atmosphere behind walls of several metres of concrete, of a life defined by constant fear of death, acute anoxia, hunger and lack of space. They also remember kilometre-long tunnels which connected some of the bunkers. When the SS by the end of the war flooded parts of tunnel-system in order to protect Hitler's Bunker, hundreds drowned underground.