Four commissioners 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. To finally stop those who are behind the insidious murders - investigators from different cities are to be sworn to this common goal: All of them were connected to the previous victims. Among them are Faber and Bönisch from the Dortmund homicide squad as well as their colleague Krusenstern from Münster, Commissioner Rettenbach from Oberhausen and Commissioner Mitschowski from Aachen. Commissioner Ziesing from Paderborn will join them and Commissioner Möller from Düsseldorf. The police chief invites the seven commissioners to a vacant conference hotel. Because time is running out: The investigators must become an efficient team as quickly as possible. This is ensured by two renowned coaches who have a great deal of experience with crisis situations.