Petra Mattfeldt / Axel Petermann

Cologne, June 2023: It's hot. The sun is blazing. The rivers are at new lows when a dismembered female body is found embedded in concrete in the Rhine.Sophie Kaiser, the BKA's ambitious profiler, is called to the scene and takes over the investigation. Due to her Asperger's syndrome, she sees things differently than others and soon realizes, together with her colleague Leonhard Michels, that a serial killer is at work. When another woman disappears, Kaiser suspects that they are not just looking for a murderer: A pair of perpetrators - a young couple, newly married - are apparently luring the women into a trap ...

Case analyst Axel Petermann and bestselling author Petra Mattfeldt have based their thriller “Im Kopf des Bösen - Ken und Barbie” on a true case. Namely the serial murders of a Canadian couple who killed several young women in the early 1990s. The media called the couple “Ken and Barbie”.