The synthetic drug "Heaven" is popular in Berlin's party scene. The manufacturer of the drug, Christoph Gerhard (Stefan Kreissig), is found dead.
The investigators Till Ritter (Dominic Raacke) and Felix Stark (Boris Aljinovic) take on the case and are supported by Melissa Mainhard (Ina Weisse), who is at their side as an experienced drug investigator.
The dead man's computer is gone, and with it the recipe for Heaven. Who is doing the business with the designer drug now? Gerhard's partner Dirk Regulator (Barnaby Metschurat), who transfers funds from the business account to a bank in the Channel Islandstransfers? Or Ivo Kaminski (Gerdy Zint), who has already attracted attention as a courier and middleman? Young Tom Hartmann (Leonard Carow), who suddenly throws money around, is also suspicious.
The inspectors uncover a completely different mystery: Melissa is terminally ill. The mother of two is particularly concerned about her eldest daughter Anny (Johanna Ingelfinger) – the pubescent girl slips away from her. What Melissa doesn't know: Through her boyfriend Tom, Anny is in danger of slipping into the milieu. Tom was seen with Gerhard on the night of the crime. When his identikit is published, he flees.