A scientist discovers what you can't see really can hurt you in this horror story. Dr. Peter Jensen (Richard Hatch) is a professor of archeology who is leading a group of students on a research assignment, in which they hope to explore an ancient Native American burial site. Or at least that's what Jensen has told most of his students; it turns out that Jensen and a few of his underlings actually have a plan to raid the site and bring home as many Indian artifacts as they can find, which will fetch them a fortune on the black market. Not all of the students think this is a good idea, and the Indian hieroglyphics in the cave where the burial site is located warns of a evil force which will take revenge on those who tamper with the site. While Jensen and his partners scoff at this, they discover that this is no legend -- and worst of all, the beast that is determined to do them in is not only powerful and deadly, but invisible. Unseen Evil also stars Tim Thomerson and Robbie Rist.