Kate returns from war and goes on a camping trip with her friends. They come across strange people living off the land and befriend a group of rock climbers. After their friend goes missing, the women team up with the climbers to survive their hike.

On their way to a family get-together, the Herring family are in a bad car accident, waking in a terrifying, dark basement. Something is there with them. Caged. And it craves human flesh. With a mysterious overseer aiding the creature like a pet, the family must work together to find a way to defeat them both and make their escape.