Bela Lugosi stars in this 12-part action-packed serial as Professor Strang, the operator of a sinister wax museum who is obsessed with getting his hands on a set of priceless jewels.
The Empire Transport Corporation is at the mercy of the Whispering Shadow, an evil mastermind who uses radio and television signals to order his henchmen to sabotage the company and murder its employees. Jack Foster (Malcom McGregor) joins renowned Detective Raymond (Robert Warwick) to capture the insidious Shadow. Clues point to Professor Strang (Bela Lugosi), who operates a sinister wax museum and is obsessed with getting his hands on a priceless set of jewels that are buried in the Empire warehouse. Strang isn't the only one who is desperate for the treasure and a no-holds-barred hunt for the riches ensues! Raymond and Foster encounter crushing walls, car chases, explosions and other breathtaking obstacles in their pursuit of the Whispering Shadow and to put an end to the wave of terror. Filmed in 18 days, The Whispering Shadow was Bela Lugosi's first serial.