A warship returning from a training exercise was tasked with apprehending an unknown schooner that had violated GDR territorial waters. Although nothing illegal was found during the search of the ship, the ship's commander Fischer was suspicious of the owner of the schooner, Arendt, a former lieutenant of a Nazi coastal battery. Fischer's doubts were confirmed when a diver came aboard the schooner and photographed a military object underwater. The investigation showed that the detained schooner was on a sabotage mission, and the "activities" of Arendt, a former Gestapo Obersturmführer, were also revealed.
Heinz Thiel
Director
Hans Oliva-Hagen
Writer
Heinz Thiel
Writer
Horst E. Brandt
Director of Photography
Hans-Peter Minetti
Lieutenant Fischer
Rolf Ludwig
Oberleutnant Arendt
Horst Kube
Private Lutz
Wilhelm Koch-Hooge
Petersen
Werner Lierck
Sergeant Kohl
Fritz Diez
Lieutenant Wegner
Günter Grabbert
Oberleutnant Hermann
Albert Zahn
Soldier Thielicke
Dieter Perlwitz
Jens Dahl
Katharina Matz
Ike
Gustav Püttjer
Ole
Manfred Borges
Sergeant Schneider
