David Petersen is traversing the Colorado Rockies.During a brief parking break, he rescued a young restaurant waitress to protect her from her violent ex-husband.Then, he embarked on his journey alone again and drove into a dangerous snowstorm.However, a mistake on the steering wheel caused him to fall into the valley with his people and his car, trapped in the center of the storm.When he woke up from his coma, he was not only facing the biting cold, but also a more terrifying threat - a beast wandering outside the car.Loneliness, coldness and fear are intertwined. How should he survive this life-and-death test?