Thirst

Out for a two-week "transformational" experience, a group of campers set off on foot into the rugged desert. But the trek isn't quite what they expected as the group finds itself being hunted and attacked by a chameleon-like alien that sucks every drop of fluid out of its victims, leaving behind a dehydrated, dusty corpse. The alien begins picking off the campers one by one and their only hope is to find a way to destroy the creature or suffer a horrible death.