Within a year, four drug addicts died of an overdose. The substance: fentanyl. A painkiller that is up to fifty times more potent than heroin. The strange thing about the cases: All four men die in Schleswig, a northern German coastal town with just 25,000 inhabitants. Nothing comparable happened anywhere else in Germany during this period. STRG_F reporter Eva Schulze-Gabrechten wants to know what's behind the fentanyl deaths. Are they just a coincidence? Or does Schleswig have a problem with fentanyl? Her search leads Eva into the Schleswig drug scene and into nursing.