A small white plane hurtles from the sky, vanishing into the wilderness. Hiker Maggie Roby watches its final descent, certain that no one could have survived.

But to her shock, a fifteen-year-old girl emerges from the wreckage, wounded but miraculously, impossibly alive. Maggie approaches with trepidation; she has secrets of her own, a past she can't escape. Saving the girl means risking her future, but she can't just abandon her, can she?

With the young survivor, Maggie embarks on a dangerous trek through the remote Appalachian backcountry, joining up with two veterans from the local sheriff's department who know the land better than anyone.

But even as Maggie charts their course through the mountains, she can sense someone--or something--else watching and waiting.

Their journey is about more than enduring the elements. It's about escaping a sinister presence that makes a vast wilderness feel like it's closing in.