River patrol emergency medic Frank Droste was drowned in the Rhine with lead on his diver's belt, after a non-fatal head wound. The water destroyed most traces. Reuther and Max duly question Kerstin Klar's blind faith in her friend, a decorated hero. Frank Droste and his predecessor as chair of the aquatic sports club Micha Haustedt blamed each-other for major accounting discrepancies, concerning forged equipment orders from Dirk Eisfeld's sports shop. Droste needed money to support his wife Hanna and his mistress Isabell Schuster who loves in another home with their kid son. Micha Haustedt's partner Vanja Resch is wheelchair-stuck since a diving accident Reuther looks into again.
—KGF Vissers