When a peg-legged prisoner (Graham Soutten) reveals a secret in return for his escape and is then betrayed, he bides his time before escaping and setting about claiming the treasure for himself. He has been away for such a long time that some of the valuables have rather bloodily changed hands and one necklace that he wants to retrieve now belongs to “Mary” (Isla Bevla). Now she knows it’s provenance isn’t whiter than white but when “Small” menacingly seeks it back, she engages the services of “Holmes” (Arthur Wontner) and “Watson” (Ian Hunter) who are soon putting some meat on the bones of…