For all appearances, Paul Ogorzow was a model German, but he also had a secret need to harass and frighten women. When, due to Allied bombing raids, a total blackout was instituted throughout Berlin, including on the commuter trains, he began attacking women riders. He began raping and murdering them, casually tossing their bodies off the moving train. It was up to Wilhelm Lüdtke, head of the Berlin police's serious crimes division, to hunt down the madman in their midst. Describes the true story of a Nazi party member and serial killer who attacked women riding on trains at night in World War II-era Berlin.