An afternoon hike in the Sierra Mountains turns into a struggle for survival when two teenage girls become hopelessly lost in an electrical storm and must rely on their own wits and strength to endure.Almost a year ago, Erin's mother Lannie suddenly left home without any explanation. Now Lannie wants to see her. "Give your mother a chance," Gram tells Erin as she takes her to the Greyhound station. But Erin feels miserable and unsure about seeing Lannie.When Erin loses her bus ticket, she hitches a ride with Mae and her older brother, Levi. Erin, an experienced outdoor enthusiast, joins the two siblings on a hike along the eastern slope of the Sierra Nevada Mountains. The trails are crowded with hikers as a deadly storm suddenly descends upon the mountain.
