In the Dutch town of Friedrichstadt, the body of a woman is found. The teacher had threatened to expose the conspiracy between a respectable faculty and an affluent parent body in favor of lazy students. However, a murderer wanted to preserve the complacency of this apparent idyll. The now-cult team of the Husum criminal police investigates once again with heart and intellect, with the sniffer pig Grosse Jäger providing not only humorous moments but also excitement as death strikes again.