Chandu consults his crystal ball and sees that Nadji, Princess of Egypt, is in danger. She is about to be sacrificed by the black magic cult of Ubasti. Headed for the magic island of Lemuria, he is shipwrecked , washed ashore and captured. He becomes invisible, escapes and after numerous detours is able to rescue the princess.
- Genre: Action, Fantasy, Romance, Adventure, Horror
- Studio: Sol Lesser Productions
- Keyword: cult, movie serial, magician
- Cast: Bela Lugosi, Maria Alba, Murdock MacQuarrie, Clara Kimball Young, Dean Benton, Phyllis Ludwig