One year since she lost her mother to a random shooting, Nora and her father are exploring a slot canyon deep in the Arizona desert. They like to stay far away from other people now, or at least Nora's father does. Nora has been working with a therapist to try to heal, and she longs to have a normal life again, to be "just an ordinary girl" like she was when her mother was still alive.

But when she and her father reach the bottom of the canyon, a flash flood rips past them, sweeping away Nora's father and all of their supplies. Nora finds herself lost and alone in the desert, facing dehydration, snakes, scorpions, and, worst of all, the beast who has terrorized her dreams for the past year. To survive, Nora must find the courage to save herself and her father...or be consumed by her grief and her fear.