Set in Austria, Spencer witnesses the burial of a liveried servant, murdered after an attempt to seize some gold in transit. Spencer identifies Lady Helena as the owner of the livery, warns her of murder, becomes her lover. Discovers the target is gold bullion in the cellar of her home, the castle at Yorick. Action is then the various attempts to steal the hidden bullion, the final elimination of the gang, and the reconciliation of the by then estranged lovers.