The death of a popular water rescuer confronts Chief Prosecutor Bernd Reuther, Chief Commissioner Kerstin Klar and High Commissioner Max Fischer with an opaque network of lies. Frank Droste, emergency doctor and member of the water rescue service, is pulled dead out of the Rhine. Changed with lead belts. All traces of the water are destroyed – except for a striking head injury. Reuther realizes that this supposed hero had no white vest. Chief Commissioner Kerstin Klar, who knew the victim, is particularly close to the case. But she also has to recognize that Frank Droste has apparently made enemies.
Are inconsistencies in the club's finances the cause of the brutal murder? Is there a connection to the water sports business of Dirk Eisfeld, Frank Droste's best friend? The victim had put the accounting errors on his predecessor Micha Hausstedt. Investigators recognize that the victim was under considerable financial pressure. Because Droste had a secret lover in addition to his wife Hanna with Isabell Schuster. Could the ladies experience each other and have cleared the fraudster out of the way? And how did the victim relate to Vanja Resch, Micha Hausstedt's life partner, who has been in a wheelchair since a tragic diving accident? Reuther realizes that Frank Droste got caught up in a murderous network of lies, which he eventually fell victim to.