The film follows John Crenshaw as he accompanies his girlfriend and her students on a weekend nature-photography expedition deep into the woods. What should be an educational and fun-filled weekend turns into horror as the group is besieged by an unspeakable evil - a horde of hideously disfigured, mutated humans with an insatiable taste for blood. As things go from bad to worse, Crenshaw becomes their only hope if they are going to get out alive.
Six members of a media company go on a weekend business retreat at an isolated lodge in the woods. When one of the members goes missing, they discover that the lodge was formerly a private mental institution that had been shut down after allegations of devious misconduct. One by one, they fall victim to the dark secrets buried at the lodge.
In 1972, a scale of measurement was established for alien encounters. When a UFO is sighted, it is called an encounter of the first kind. When evidence is collected, it is known as an encounter of the second kind. When contact is made with extraterrestrials, it is the third kind. The next level, abduction, is the fourth kind. Modern-day, Alaska, where-mysteriously since the 1960s-a disproportionate number of the population has been reported missing every year. Despite multiple FBI investigations of the region, the truth has never been discovered. Here in this remote region, psychologist Dr. Abigail Tyler began videotaping sessions with traumatized patients and unwittingly discovered some of the most disturbing evidence of alien abduction ever documented. The Fourth Kind exposes the terrified revelations of multiple witnesses. Their accounts of being visited by alien figures all share disturbingly identical details, the validity of which is investigated throughout the film.