A young woman lies dead at the port, raped and suffocated. Kopper remembers a similar case in Mannheim. Based on this clue, Lena finds more unsolved murders in Mannheim and Ludwigshafen. Are the detectives on the trail of a serial killer targeting confident, athletic women? During their investigations, Lena Odenthal and Mario Kopper come across a ship that was instopped at the port in question, Mirko Zessner works there, with a previous conviction for rape. But Lena doubts: could it be that the wanted murderer is so calculated that he planned Zessner as a "pawn victim"? Otherwise, the break-ins into the victims' homes make no sense. When Lena realizes that she fits exactly into the victim profile, she offers herself as a decoy...