A valuable painting is stolen from the Hotel Gasthof Post in Lech. Who is behind it? And what are the motives of the unknown perpetrator? The municipal philosopher Katrin Neuer, who happened to be present, and her friend, the urban sociologist Oliver Vonlanthen, take over the investigation of the case together with the police as amateur investigators. You will learn a lot about the history and inner workings of the Post office, but also about the country and the people in Lech. After various traces have led to a dead end, it finally succeeds in overrunning the true perpetrator and bringing him to justice.