Evie and Nate join their close friends, John and Anna, for a night of joyriding and partying. However, the night does not progress exactly the way they expect. Instead, they have an automobile accident involving a buck and end up in a pile of debris on a steep mountainside. Trying to walk their way to civilization, the summer heat and lack of supplies leave them feeling helpless. After a full day's journey, they still see no signs of life: no traffic,...