"Primordial nature runs amuck in a smartly played, scripted, spectacular slice of neo Ozploitation.
12,000 years ago a caveman tried to communicate the presence of an unknown primal entity only to be devoured by the Neanderthal evil. Now six friends on a field trip set up camp in the same remote wilderness. But when one takes a dip in a nearby water hole, she becomes feverish and agitated, and regresses to a predatory state where her companions become the hunted. When another begins the same beastly transition, terror descends on the remainder as they realize its kill or be killed. Sooner or later one will have to venture into the creepy mountain caves to confront the cause of all the monstrous mayhem.
A frenzied visceral nightmare in the vein of CABIN FEVER, PRIMAL is a hugely enjoyable roller coaster ride through primitive panic with the best one-word ending ever!" Quoting the program notes from the 2010 Fantastic Fest site.