The sole survivor of a plane crash, seventy-two-year-old Cloris Waldrip finds herself lost and alone in the unforgiving wilderness of Montana's rugged Bitterroot Range, exposed to the elements with no tools beyond her wits and ingenuity. Intertwined with her story is Debra Lewis, a park ranger struggling with addiction, a recent divorce, and a new mission: to find and rescue Cloris. As Cloris wanders mountain forests and valleys, subsisting on whatever...