It stars Kim Darby, William Shatner, Diane Varsi, Laurie Walters, and Dan O'Herlihy.
Melodye Amerson is a young teacher who goes to a remote area to work with a group of individuals who have isolated themselves from civilization and maintained an independent community, vaguely similar to the Amish or a religious commune.
Melodye is unnerved by the secretive behavior of her students, and the fact that all fun, games and activities she proposes are forbidden to them.
Melodye soon discovers that the secluded and "backwards" residents are actually aliens with mild paranormal powers.
As noted above, the film was notable for its second pairing of William Shatner and Kim Darby, who had worked together in the Star Trek episode "Miri."