Seventy-five years after Brad Washburn, one of the greatest aerial mountain photographers of all time, first shot Alaska’s Denali Mountain from the open door of an airplane, climbing buddies Renan Ozturk, Freddie Wilkinson, and Zack Smith look at some of his mountain photographs and have this crazy idea. Rather than go up, their dream is to go sideways across the range’s most foreboding peaks, the Moose’s Tooth massif. It’s a fresh new way to explore the same landscape Washburn first discovered. As the group endures rough conditions, disintegrating ropes, and constant rockfall, their desire to be the first to complete the audacious line grows into an obsession. But friendships begin to fray when Renan suffers a near-fatal brain injury, forcing all three partners to decide what’s most important to them.