Complete blackout: After waking up, Commissioner Thiel cannot explain how he ended up in this hotel room. And what are Professor Boerne and the big plush koala doing there on the edge of his bed? But it gets even worse: A body was found in the forest nearby. It is about Thiel's ex-boss from his time with the Hamburg homicide squad, whom he has not seen for years. Or is it? Professor Boerne is fascinated by Thiel's amnesia and accompanies him in his search for clues. "The devil's staying power" is the 40th "crime scene" in Münster with the successful investigative team of Axel Prahl and Jan Josef Liefers.