The stars of a 1970s sci-fi show – now scraping a living through re-runs and sci-fi conventions – are beamed aboard an alien spacecraft. Believing the cast’s heroic on-screen dramas are historical documents of real-life adventures, the band of aliens turn to the ailing celebrities for help in their quest to overcome the oppressive regime in their solar system.
A young woman with no strong religious beliefs, Frankie Paige begins having strange and violent experiences, showing signs of the wounds that Jesus received when crucified. When the Vatican gets word of Frankie’s situation, a high-ranking cardinal requests that the Rev. Andrew Kiernan investigate her case. Soon Kiernan realizes that very sinister forces are at work, and tries to rescue Frankie from the entity that is plaguing her.