The Sleeping Cardinal

Young foreign diplomat Ronald Adair (Leslie Perrins) becomes the blackmailed pawn of devious criminal Dr. Moriarty, who threatens to expose Ronald's gambling habit if he does not make a delivery of stolen notes to France. Having been tipped off by his partner, Dr. Watson (Jan Fleming), regarding Ronald's weakness, the brilliant detective Sherlock Holmes (Arthur Wontner) soon discovers where Moriarty is holding the young diplomat, and engages in a cat-and-mouse game to trap his arch enemy.