The city of Schwerin is melting-- it is the hottest summer season in years. Detectives Lona Mendt and also Frank Elling are on the trail of a serial murderer, who seems to choose his victims randomly. But absolutely nothing is as it appears. The detectives have evidently made some effective adversaries that will certainly do everything in their power to keep the fact from emerging. The further along with their investigation Frank Elling, a dedicated spouse and also father, and also the withdrawn Lona Mendt obtain, the bigger the challenges come to be.