Watch Verdunkelung (1976) Official Trailer

Berlin in the Second World War. A certain S-Bahn line is repeatedly the scene of brutal attacks on women. The police are in the dark. As the attacks become more brutal and the first women's bodies are found, the population becomes restless. The authorities put pressure on the police, demanding a quick investigation, but at the same time obstructing the investigation so as not to tarnish the current propaganda. So the police can only move from one crime scene to the next and wait for the perpetrator to make a mistake. And he continues to murder diligently...