John P. Baniqued

Shortly after a chemical weapon explosion in the Nevada desert, two scientists find themselves confronting a sinister cover up, and a band of hostile survivors who are looking to escape the quarantined area known as Territory 8. (imdb)

A school teacher and her wheelchair-bound sister purchase a house that seems to be haunted by a strange supernatural force. Father LeCleur and his son Raymond are called in to vanquish the demonic entities. But when the hell-spawn turn out to be much stronger than anyone thought, a bloody showdown ensues.