Prof. Dr. Jürgen Kaiser's corpse is found in the farmhouse he was to buy trough real estate agent Gerhard Hanslein from farmer Rainer Kastner by them together. Sebastian and Anton separately fund out he was dating precinct accountant Patrizia Ortmann's mother Gerlinde, who knew he changed his name from Roland Kerner being an accomplished marriage swindler, believing he was giving that up for her. The fat cash down payment was stolen. Stadler and König also consider marriage swindle victims like Herbert Günzel and dodgy dating agency manager Konrad Menge.