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.

Don Murray
as Kurt Schröder

Christine Kaufmann
as Erika Jürgens

Werner Klemperer
as Walter Brunner

Ingrid van Bergen
as Ingeborg Schröder

Edith Schultze-Westrum
as Frau Schröder

Bruno Fritz
as Uncle Albert

Maria Tober
as Marga

Horst Janson
as Günther Jürgens

Carl Schell
as Major Eckhardt

Anita Kupsch
as Bambi