Professor Henry Morlant, a great Egyptologist, thinks that the ancient jewel which he calls the "Eternal Light" will give him powers of rejuvenation if it is offered up to the ancient Egyptian god Anubis. But when Morlant dies, his servant Laing steals the jewel.
Boris Karloff as Prof. Henry Morlant, Cedric Hardwicke as Broughton Ernest, Thesiger as Laing, Dorothy Hyson as Betty Harlon, Anthony Bushell as Ralph Morlant, Kathleen Harrison as Kaney Harold, Huth as Aga Ben, Dragore D.A. Clarke-Smith as Mahmoud, Ralph Richardson as Nigel Hartley, Jack Raine as Davis the Chauffeur and George Relph as Doctor.
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