In the Danish port city of Belgesund, the caretaker of a private high school has fallen victim to murder. Detective Thomsen takes on the case and finds that behind the clean facade there are abysses. He has five suspects in mind: the teacher Berling, who is having a relationship with a student, the twin brother and sole heir of the murdered man, the murdered man's shady roommate, the primary school teacher Klaus Erikson and his brother Jakob.
Hans Nielsen
Dorothea Wieck
Friedrich Schoenfelder
Ina Halley
Blandine Ebinger
Josef Sieber
Franz Nicklisch
Hans Leibelt
Henry Lorenzen
Lutz Moik
Gunnar Möller
Friedhelm von Petersson
Horst Gentzen
Thomas Lundberg
Karl Klüsner
Arno Paulsen
Gustav Püttjer
Ottokar Runze
Werner Schott
Kurt Waitzmann