A wonderfully sinister and atmospheric horror film. Professor Morlant (Boris Karloff) is an Egyptologist who has taken a valuable jewel which he believes grants eternal life. Aga Ben (Harold Huff) seeks to restore the jewel but the Professor dies before he can reach his dark mansion. The Professor insists on an elaborate burial in a tomb by his sour Scottish servant Laing (Ernest Thesiger) with the jewel in his hand. But someone steals the jewel...
As the Professor's friends and family Ralph (Anthony Bushell) and Betty (Dorothy Hyson) gather in the mansion the Professor appears to raise from the dead, however without the jewel he is a ghoulish zombie. Now intent on revenge on whomever stole the jewel...
The film has a creepy build-up followed by a rather frenetic final act with various capers including a burning tomb and some cops and robbers. The Golden Age fetish for the esoteric mysteries of the Orient are strong with this one. There is some good humour too and witty lines. One particularly enjoyable scene is where Betty's friend Kaney (Kathleen Harrisson) and Aga Ben hilariously send up the erotic desire for The Shiek.