Don Murray, Christine Kaufmann, Werner Klemperer, Ingrid van Bergen, Edith Schultze-Westrum, Bruno Fritz, Maria Tober, Horst Janson, Carl Schell, Anita Kupsch, Helma Seitz, Kai Fischer, Ronald Dehne, Alfred Balthoff, Kurt Waitzmann
East Berlin, shortly after the construction of the Berlin Wall. Kurt Schröder and his family dig a tunnel to escape to West Berlin as they struggle to overcome the obstacles blocking their underground path to freedom.