Lessing - 09 - Die harte Kern

The Weimar detectives Kira Dorn and Lessing bring the junkyard owner Harald Knopp to court. He is said to have murdered an art collector 15 years ago. During the trial, Knopp surprisingly presented the murdered woman's nephew, Rainer Falk, as a defense witness and was acquitted. Shortly thereafter, Lessing finds Knopp who has been shot. When it turns out that the fatal shot was fired from Lessing's service weapon, the commissioner is suspected of murder. Special Counsel Eva Kern, a former colleague of Kurt Stich, takes on the case. It's not good to eat cherries with her. Lessing ends up in a cell, Kira Dorn is withdrawn from the investigation because of bias. Supported by the policeman Lupo, who has just fallen in love, she does everything in her power to prove Lessing's innocence.
She visits Knopp's brother Georg and his wife Hannah , who dreams of having her own theater as an actress. From them she learns that Harald Knopp's esoterically interested wife Birte left her husband despite the acquittal. Birte doesn't believe in his innocence and is convinced that the god of misery is responsible for her whole misery. Rainer Falk also makes himself very suspicious when he tries to force Birte at gun point to hand over an old Indian statue at Knopp's junkyard. Kira's intervention prevents things from getting worse. Falk escapes, but that same night, Falk is assassinated by a woman in a green parka like Kira's. The special investigator starts a manhunt.
In order to prove their innocence and catch the real culprit, Kira Dorn and Lessing have to flee from their own colleagues.