Old Roger Melton has died, leaving behind one of the greatest fortunes in Europe. His arrogant relative Ernest Melton expects to be the heir, but much to the family's surprise Roger leaves his vast estate to his obscure young nephew, Rupert Sent Leger. But Rupert's newfound wealth comes with strange conditions attached, one of which is that he must inhabit the old castle of Vissarion in the remote Balkan nation known as the Land of the Blue Mountains. Rupert, an intrepid adventurer, agrees and travels to Vissarion with his Aunt Janet, who possesses the occult power of Second Sight. But all is...