In the autumn of 1925, Johann Reintaler is found brutally murdered in the Murnau Moor, and a difficult investigation begins for Inspector Heini Bieder. Does the innkeeper Sigi Kammleitner, to whom Reintaler owed a large amount of gambling debts, have anything to do with the murder, or perhaps the victim's sister, who was allegedly offered to his creditors as collateral? Or does the key to the crime lie in the events of 1909, when Gabriele Münter and Wassily Kandinsky created artistic masterpieces of the Blue Land region in the Murnau Russian House? New product