New Year's morning. The body of a woman is found on the edge of a schoolyard. Conny Mey and Frank Steier are amazed at how quickly they manage to determine the woman's identity: it is Agnes Brendel, and she was obviously well known in this neighborhood like a sore thumb. Agnes was poor, always had bad luck with men and, despite having a partner, Agnes often roamed the pubs alone. Mey and Steier try to reconstruct the last days before she was murdered. The proprietor of a pub, other regular customers, the kiosk owner, even the parish priest, with whom she often went to church, and many others from the neighborhood – all of them can remember when they last saw Agnes. But the statements do not match.
Did the killer know Agnes, or was she just in the wrong place at the wrong time? What role does her partner Viktor play, and what does Father Markus know? The commissioners are puzzled. In addition to Joachim Król and Nina Kunzendorf, the cast includes Paulus Manker, Rainer Bock, Florian Lukas, Vincent Redetzki, Anna Böttcher, Robert Viktor Minich and Gerd Wameling. Lars Kraume again wrote the screenplay and directed this fourth case, which is again based on an authentic event from the book "On the Trail of Evil" by detective inspector and crime scene analyst Axel Petermann.