Seventeen-year-old Ethan Underwood is totally unprepared to search for his father in the Blythe River National Wilderness. Not only is he small, scrawny, and skittish but hes barely speaking to the man after a traumatic betrayal. Yet when his father vanishes from their remote cabin and rangers abandon the rescue mission, suddenly its up to Ethan to keep looking. Angry or not, hes his fathers only hope.