Best friends Neena and Josie spent high school as outsiders, but at least they had each other. Now, with college and a two-thousand-mile separation looming on the horizon, they have one last chance to be together: a three-day hike deep into the woods of the Pisgah National Forest. But a detour off the trail leads them straight into a waking nightmare -- and then into something far worse. Something that will test them in horrifying ways.