After a fierce argument Steffi Zinn′s husband leaves the joint flat and stays away from home over night. The next morning, his wife Steffi has disappeared and is reported as a missing person. Captain Lohm takes over the case and at first looks for signs of a murder, but to no avail. Then, Steffi′s body is found in a lake. After her funeral, a stranger who had attended Steffi′s funeral for a short time is also found dead in a lake, and the connection between the two cases becomes apparent.

Winfried Glatzeder
as Hauptmann Lohm

Horst Schulze
as Zinn

Peter Bause
as Leutnant Gallig

Wolfgang Penz
as Unterleutnant Rein

Wolf Goette
as Lorras

Hans-Joachim Hanisch
as Zumseil

Micaela Kreißler
as Steffi Zinn

Birgit Edenharter
as Vera Lohm

Marianne Wünscher
as Frau Zoll

Agnes Kraus
as Frau Lemke