The victim was in a permanent clinch with her neighbor Wilhelmine Klemm. But could the renowned Münster prosecutor actually have something to do with the death of the seriously ill Patrizia Merkens? Wilhelmine Klemm's adversary in office, public prosecutor Ungewitter, doesn't want to rule that out. And so detectives Frank Thiel and Nadeshda Krusenstern investigate in all directions. Her search for clues leads her to the zoo, among other places.Here the – according to reports – unsociable Patrizia Merkens was obviously a permanent guest. Meanwhile, forensic pathologist Prof. Boerne has caught the fever of cooking, because none other than gourmet and media producer Dr. Stockmann gives the forensic pathologist the chance for a second career as a TV chef. What Patrizia Merkens actually died of requires a final toxicological investigation.