S12, E4: The car struck the young jogger head-on. The absence of skid marks at the scene suggests only one thing, that Nadja Darii was mown down in cold blood. A journalist for the Münchner Nachrichtenblatt, Nadja was relentless in her pursuit of the truth, and detectives make startling discoveries when they search her apartment and find her research into the Schöntal Clinic, and in particular kidney specialist Dr. Leyla Sahin. The team are convinced the secrets Nadja uncovered were what led to her murder. As the investigation deepens, connections between the clinic and the journalist's fate expose a chilling conspiracy.