
Every Friday the 13th, a member of the Eulenstein family dies. The son of the most recent victim hires a detective to investigate.

Reinhold Schünzel
Engelbert Fox

Max Gülstorff
Dagobert Fix
Ernst Ludwig
Herbert von Eulenstein
Hans Marton
Marcell von Eulenstein

Werner Krauss
Prof. Cardallhan
Franz Ramharter
Dr. Schmidt
Rosa Liechtenstein