The traumatized Diana Schirmer is a witness in the burglary and robbery case in which her husband Uwe died. During the police confrontation, she identifies Frank Jensch as the perpetrator, who is then taken away. The evidence against him is thin, but Diana Schirmer's testimony may be enough for a conviction. But then another fatal burglary happens, following the same pattern. Isn't Frank the culprit after all? Did he have an accomplice? When Vera suddenly discovers that Diana herself had a motive for her husband's murder, the chief inspector has to doubt the credibility of the witness. In addition to the investigation, Vera Lanz has to fight for her own credibility.
The death of multiple murderer Christian Farron, whom the chief inspector claims to have shot in self-defense, is being investigated by internal investigator Dominik Schneider. Vera Lanz and her colleagues Jan Trompeter and Paul Böhmer as well as senior public prosecutor Dr. Seitz have to take a stand. Four episodes of "Die Chefin" will be broadcast on Fridays at 8:15 p.m.