State of emergency in North Rhine-Westphalia! Four inspectors from different departments have already been killed. There has never been a comparable series of murders in the history of the state. But a hot lead is missing, the investigators are groping in the dark - and the pressure is increasing ... Finally stopping those behind the insidious murders - this is the common goal that investigators from different cities are to swear to: All of them have been in contact with the previous victims. Peter Faber and Martina Bönisch from the Dortmund homicide squad and their colleague Nadeshda Krusenstern from Münster are there. The investigation team also includes Inspector Rettenbach from Oberhausen and Inspector Mitschowski from Aachen. Inspector Ziesing is joining them from the Paderborn criminal investigation department, and Inspector Möller is coming from Düsseldorf.

A murderer remains at the scene of the crime and demands to speak with Peter Faber.

Falke and Grosz investigate a murder in Hamburg's red light district.

A secret society of law students exercise strange control over a new member.

A split-second decision during a standoff sends Lindholm and Schmitz down an Orwellian rabbit hole of conspiracy and deceit.

Lindholm and Schmitz navigate dangerous politcal waters to find the killer of a far-right blogger.

In the middle of an event at the police college, a young student freaks out and stabs her buddy. He still dies at the scene in the arms of the helpless main commissioner.

Eisner and Fellner investigate the murder of a bodybuilder.

The murder of a 90-year-old Berlin building tycoon appears to be politically motivated.

Eisner and Fellner find themselves caught in a war between conventional medicine and alternate healing methods.

Eisner and Fellner investigate the death of a homeless man.