Gillian and Anna are young sisters raised by a single mother. Once close, they find themselves slowly drifting apart as time and distance begin to pull them in different directions. In an effort to come together one last time, the two girls and their friends take a road trip to the mountain community of Doe Pass, where they intersect with a ritualistic cult that pulls them deep inside the Mountain. Anna manages a narrow escape only to face impending death on the mountainside as she is ravaged by the elements. Lenard, an elderly recluse who lives on the mountain, finds Anna caught in the iron jaws of one of his traps. He carries the broken girl to his cabin where she regains consciousness and tells him her story. Faced with all bad options, the duo proceed back into the Mountain in an effort to save Gillian and their friends. The Mountain is not having it.
