Director: Dominik Graf
Script: Günter Schütter
Cast: Klaus Wennemann, Dietrich Mattausch, Hans-Jürgen Schatz, Maja Maranow u.a.
Camera: Diethard Prengel
Editor: Romy Schumann
Music: Dominik Graf, Helmut Spanner
Producers: Jan Hinter
Production: Bavaria Film GmbH
Co-production: Westdeutsches Werbefernsehen (WWF)

The investigator – the German crime show icon of the Ruhr District – is responsible for the protection of a key witness in a drug trial. A story in a highly confined setting with gripping dialog: for Dominik Graf not only a key film, but also a forerunner of Der scharlachrote Engel.