An unspeakable act brought her there, where an unimaginable horror was waiting.High in the mountains, a blizzard smothers the light of the full moon. A car fleeing downhill loses control and crashes. Twenty-something Katie McGill stumbles from the icy wreck and finds shelter miles away at an isolated, two-story house hidden among the dark mountainside. All the lights are on. The fireplace is lit. The front door is unlocked. But no one is home. Exhausted from the trek, Katie thaws by the fire, waiting for the homeowners to return. Lost in thought over the gut-wrenching events that led her there, she misses numerous warning signs around her. Until the ceiling creaks from the floor above. Trapped there for the night, she knows she has to investigate. The tension escalates with each reluctant step up the staircase until the terrifying truth is revealed. If Katie plans to make it out alive, she’ll have to dig deep and summon the strength for a grueling confrontation with what’s been watching her the entire time.