Walter B. Gibson's mysterious hero still knows "what evil lurks in the hearts of men"! This first of three films from Poverty Row's Monogram Pictures Corporation finds Lamont Cranston (Kane Richmond)─aka The Shadow─taking on a case involving stolen jewels and a secret formula for plastics. With the help of fiancée Margo Lane (Barbara Reed), the intrepid crimefighter unmasks another nefarious underworld plot! Tom Dugan, Frank Reicher co-star in this humorous crime yarn. 61 min. Standard; Soundtrack: English.