It features a cast of well-established stars including John Huston, Shelley Winters, Mel Ferrer, Glenn Ford, Lance Henriksen, and Sam Peckinpah with supporting appearances by Neal Boortz and Steve Somers.

[4][5] In an enigmatic, alien landscape, Jerzy Colsowicz experiences a vision of a powerful and destructive storm brought about by a young human girl.

His colleague, an enigmatic Christ-like figure, tells his bald pupils about the centuries-long cosmic conflict between Zatteen, an evil inter-spatial force of immense magnitude with powerful psychic abilities, and his benevolent arch-rival Yahweh.

Zatteen escaped to the planet Earth centuries ago, and though he was eventually tracked down and killed by Yahweh, his spirit lives on in the minds of mankind, waiting for an opportunity to reemerge and wreak havoc.

The figure tells his disciples that Zatteen had produced dozens of children with human women before his death, and these descendants continue to populate the Earth.

His associate Dr. Walker reminds him that his girlfriend Barbara Collins can be used as a conduit to distill Zatteen's powers into a corporeal, human form.

Her 8-year old daughter Katy has already displayed psychokinetic abilities, and it's the Satanists' goal to have Raymond father a male child with Barbara, who in turn will mate with his half-sister and produce the physical embodiment of Zatteen.

When she returns home, she is attacked for her actions by Raymond and Katy, who attempt to execute her by tying a wire around her neck and sending her down the stairs in her chair lift.

[11][12] Katy's ominous powers are rendered in the style of The Omen, and the conflict over her nature, with good winning out over evil due to the help of an elderly man, led critic Sean Axmaker to call the film an "Exorcist knock-off".