The last thing Cora Lincoln needed was another big project, but here she was. She had just finished restoring a run-down cabin nestled in the Appalachian Mountains.

When her first guest, Luke, doesn't show up, she brushes it off. Five days later, Luke was found mangled in the forest not far from the cabin. Cora remembers the story of Harper Cooper, a teenager who suffered a similar fate.

People say you should be scared of the monsters under your bed, but the monsters outside are so much worse.