In the tourist metropolis of Freiburg, a tour guide is found shot dead. The streams in the city center suddenly turn blood red, and mannequins are hanging in the city garden. What is going on here? Katharina Müller, an editor at the Freiburg Regio-Kurier, and Chief Inspector Jürgen Weber are investigating. With their investigative instincts, they shed light on the darkness and find themselves in a real sweat.