The "Haus Lüdecke" has a long history and is well-known beyond Münster's borders. A corpse is found in the moat of the old moated castle - in knight's armour. The dead man is the newly crowned lord of the castle, Manfred Radtke. Was it an accident or is there more to it than Inspector Thiel suspects? Only a few months ago, the former fair king Radtke bought the venerable castle and wanted to hold medieval games here with his family in the future. Central theme: the bloodthirsty history of the Anabaptists in Münster. Boerne is appalled; You don't joke around with Münster's blackest chapter! But the preparations are already underway. Does the whole project now have to be called off in view of the death?