A professional was at work here. Police officer Gerd Samland was murdered in a brothel with two well-placed shots. Was Max Ballauf's friend and colleague actually a regular at this establishment? To ensure that nothing is swept under the rug, the "Internal Investigations" department intervenes: Samland, who worked for the motorway police, was involved in illegal dealings with the underworld, claims Detective Inspector Brauer. He takes over the case from the homicide squad.