The first case of the new Saarbrücken commissioners "Das fleißige Lieschen" leads into the middle of the web of a completely hostile industrial family in which everyone hates everyone. The younger of two brothers, who was to take over the family business, was murdered. It quickly becomes clear that the background that led to the murder goes back far into the past. The father of the two brothers has already died under mysterious circumstances. During the Second World War, the company employed - like so many at that time - forced laborers. Here are the causes of the current events