Drug dealer Timo Wagefeld was fatally stabbed on a playground. A syringe and banknote in the corpse's arm are the posthumous mark of jailed dealers killer Adrian Schütt, a former junkie who maintains his innocence; the knife also fits. Only regular visitor is romantic correspondence lover Manuela Brück, a veterinarian, who confesses having smuggled a cellphone in jail for him. Vincent must shoot Andreas Mantschewski who wounded Jan while they investigate the chemically marked research lab heroin stolen from Timo.
—KGF Vissers