Macabre women bodies are found in the dunes of Husum. The crime series bears the signature of the serial killer Eberhard Wernicke, who is in a psychiatric ward. Apparently there appears to be a copycat. Contacting Wernicke and the investigator at the time does not help the inexperienced police commissioner Ria Larsen and the murders continue. But then a man is killed and the question of the motive of the perpetrator arises.