Inge Karsten receives an unexpected visit from her former student friend Margit from the West. She is even more surprised to hear that she is married to her stepbrother Herbert, who was long thought to be missing and whom she had almost forgotten. He last lived in Canada. This presents Inge's husband Horst, who has an important job as a military pilot, with a conflict of conscience. The situation is even more serious than it seems at first glance. In truth, Margit is an agent and the whole story is a staged game by the West German secret service...
Annekathrin Bürger
as Margit Steiner
Kati Székely
as Inge Karsten
Alfred Struwe
as Horst Karsten
Rudolf Ulrich
as Major Seidel
Herbert Köfer
as Hauptmann Kranz
Jürgen Frohriep
as Major Sander
Ezard Haußmann
as Oberleutnant Kempf
Heinz Behrens
as Leutnant Schütz
Otto Stark
as Helmer
Kurt Müller-Reitzner
as Funker
Horst Schön
as
Hannjo Hasse
as
