Business magnate Roger Melton has passed on, leaving behind one of the grandest fortunes of his time. To the family's astonishment, Roger has bequeathed his vast estate to the black sheep of the family, his young nephew Rupert Sent Leger. But Rupert's inheritance involves the most extraordinary conditions, including one stating that he must reside in the ancient castle of Vissarion in the Land of the Blue Mountains. Rupert travels to Vissarion with his Aunt Janet, who possesses the occult power of Second Sight. But despite all the precautions Rupert is visited by a mysterious woman veiled in a burial shroud. Beguiled by her otherworldly and ethereal beauty, Rupert ponders whether she is a vampire, a ghost, or another sort of mystic creature altogether. Determined to find out for himself, but has no idea of what dangers he has to face.