A wealthy lord dies and is entombed with a valuable deposit of jewels. Seven keys are required to unlock the tomb and get hold of the treasure. A mad doctor uses an iron maiden to systematically eliminate the heirs to the fortune.
Leslie Banks
Lilli Palmer
Cathleen Nesbitt
Gina Malo
David Horne
Romilly Lunge
Richard Bird
J.H. Roberts
Aubrey Mallalieu
Harry Hutchinson
Phil Ray
George Street
Ross Landon
Raymond Mander
Charles Paton
