A past that won't let you go - Commissioner Selig's third case. The old man who comes to Chief Commissioner Paul Selig's office has an unusual request: he wants to report a murder, and the victim is himself. He already knows the perpetrator: Erhard Lartnik, a respected citizen of Berlin. He trusts that Selig will bring him to justice as the murderer. Selig thinks it's a joke, but the next day the old man is found dead in an apartment in northern Berlin. The clues that Selig and his colleagues find at the crime scene actually lead to Lartnik, and the evidence is clear. Lartnik is arrested, and the case seems closed. However, Selig finds this solution too neat. He doubts the findings and continues to investigate. His persistence uncovers more than just surprising connections to Germany's recent past.