Eight-year-old Lukas was kidnapped on the street. And while fleeing the crime scene, the kidnapper also kills the only witness. Ballauf and Schenk are puzzled. Why was the boy kidnapped? Is it blackmail? Lukas comes from an intact family that lives in modest circumstances. Or is there a sex offender at work here? The boy's mother, Simone Schäfer, reacted completely upset to the shockingNews. Her sister and brother-in-law stand by her side. And Lukas' father Roman Sasse, who travels a lot as a freelance software consultant, is also there immediately. The remains of Lukas' mobile phone are secured in the completely burned-out crime vehicle. However, the children's cell phone is not registered in the name of Lukas' parents, but in the name of Ruth Junghann. But she has never heard of Lukas Schäfer.