The first case of the new Saarbrücken commissioners "The hard-working Lieschen" leads into the middle of the network of a completely hostile family of industrialists in which everyone hates everyone else. The younger of two brothers who was supposed to take over the family business was murdered. It quickly becomes clear that the background that led to the murder goes far back into the past. The father of the two brothers died under mysterious circumstances. During the Second World War, the company – like so many at the time – employed forced labourers. Is this the cause of the current events?