Bielefelder and Klaus, who successfully escaped an afternoon with the whole family, are amazed when Manuela Arndt comes to the area and confesses to murder. The farmer says that she strangled Sonja Zirowa, her son's girlfriend, with her own hands and buried her in the barn. This had a bad influence on Hannes because she wanted to emigrate to Norway with him. A quick case for the „ Rentnercops "? Bielefelder and Klaus don't believe in that. Because the farmer does not really appear credible when she confesses. Dr. Lara Krüger examines the body and finds out that it was strangled with a belt. Why is Manuela lying? Then the coroner finds out that the body can never be Sonja. Hui Ko confirms this because Sonja really lives in Norway.Investigators are puzzled: who is the body?