This is the war and everybody in Germany should beware : the enemy is listening. One family in particular had better be even more careful than the average citizen of the Reich : the Kettwigs. Indeed they own an armament factory and their engineers, technicians, workers and of course themselves belong to a highly sensitive sector. They are under the constant scrutiny of those who want to get hold of the secret weapons devised in the plant, notably of a wire which, when attached to a balloon, may become the most effective anti-aircraft ever. For sure, they should distrust everybody. Isn't Nolte, the waiter, an enemy agent? Should young Bernd Kettwig allow himself to be seduced by this pretty woman ? As for Bernd's secretary, is she right when she lets this handsome man woo her?
René Deltgen
Karl Ludwig Faerber
Kirsten Heiberg
Lilly
Lotte Koch
Inge Neuhaus
Michael Bohnen
Kettwig, Beriebsführer
Josef Sieber
Werkmeister Böttcher
Rudolf Schündler
Zeichner Grelling
Lola Müthel
Phillis
Erich Ponto
Monsieur Bock
