Under a highway bridge, a body is discovered that has a deep puncture wound in the place of her heart. First indications indicate: The young woman was stabbed deliberately. A short time later appears another dead woman, who was also killed with a targeted stab in the heart. Apparently, the investigators are dealing with a serial killer. They receive support from the profiler and old friend Frank Seefeld. For Jan Maybach, the case is proving to be a test. During Ina Zimmermann's absence, he has to lead the team, but increasingly gets into a personal conflict with Frank Seefeld, which endangers the investigations. In addition, Frank Seefeld flirts offensively with Leni Maybach, who writes about the case as a journalist.