This is the story of a man who paints (!) faked bank notes with little errors, e.g: "HUNDERT FALSCHE MARK" (100 faked marks) instead of "HUNDERT DEUTSCHE MARK" or "DEUTSCHE BUNDESBAHN" (German Federal Railroad) instead of "Deutsche Bundesbank".
Eventually the police gets an important tip-off with such a bank note, solves a murder case and catches a gang of real counterfeiters.
The man who painted faked bank notes really existed and was known as "Blüten-Rembrandt" (Rembrandt the Forger). The rest of the story is well-invented.