In Arizona during the Civil War, a woman is accused of witchcraft, tied to a horse and left to die in the desert. One hundred years later, the descendants of the woman's accusers start being killed off, and the townspeople suspect the woman has come back as an evil spirit.

The plot concerns two documentary film students who travel to a small, isolated town in the middle of nowhere to film a documentary about murders that occurred there. Soon they are stalked by someone who is afraid the students are getting to close to a close guarded secret in the town that led to the murders.

An electronics expert searching for evidence of aliens picks up signals that he believes are from an alien spacecraft--and they are coming from a lake near town.