When twelve-year-old Donn Fendler grows impatient waiting for his father and brothers at the top of Maine’s tallest mountain, he chooses to navigate his own route back to their campsite. However, Donn is unprepared for a sudden fog that conceals the trail. He also doesn’t anticipate tumbling down a slope that renders him invisible to others. Nor does he foresee making a wrong turn that results in him being lost and wandering aimlessly for almost two weeks in the desolate mountain wilderness.