The owner of a newly renovated hotel is found dead. He fell to his death from the window of his office. The safe in the office has been broken into. Everything points to a robbery-murder. Beissl and Jerry quickly come up with a possible motive: the victim consistently refused to pay the tradesmen involved in the renovation.

Beissl and Jerry are confident that they will find the murderer among the cheated craftsmen. One of the victims increasingly becomes the focus of the investigation: a master carpenter who is a friend of Beissl's. But the resolute boss of the painting company is also under suspicion. Did she take the money from the safe? Both firmly reject the suspicions. But what if it wasn't one of the craftsmen? The hotel's long-time concierge also comes under scrutiny in the investigation.

The owner of a bicycle shop is found dead in his store by his girlfriend Steffi and his employee Tom Lehnert. Steffi's ex-boyfriend quickly comes under suspicion by Beissl and Jerry. He clearly hasn't gotten over the breakup and has been stalking her.

The deceased also owed a good friend a lot of money, which the friend demanded back shortly before his death. But it is only when the detectives take a closer look at Tom Lehnert's past that they track down the murderer.