Baltasar Kormakur directs this dramatized adventure story based on the well-chronicled true events that occurred to a couple of commercial mountain climbing expeditions seeking to safely take relative novices to the top of Mount Everest, the world's highest mountain, in 1996. Jason Clarke plays father-to-be Rob Hall, the leader of one of those groups, a well-respected climber who helped to build up the burgeoning industry at Everest with his company out of New Zealand, Adventure Consultants. The other expedition, Mountain Madness, is led by American rival company leader Scott Fischer (Gyllenhaal), who sees it as a more commercial operation that employs a more hands-off approach as much as they can. We get introductions to all of the important characters at their various base camps prior to their ascent, establishing their reasons for their undertaking the treacherous climb, as well as lots of foreshadowing on the things that will eventually come into play later, especially in how critical it is to begin the descent before the freezing cold and unpredictable weather kicks in, not to mention the sheer lack of oxygen that wil surely kill any like that doesn't have a functioning oxygen tank. This certainly is put to the test when a massive snowstorm enters the area just as the climbers are near the peak, putting everyone into mortal jeopardy with very little margin for error. What follows next is a pure story of survival during nighttime near the highest point on Earth, as all of these characters must find a way to get down to a safe zone before they end up losing limbs to frostbite, or worse, caked in ice on the side of the grand mountain forever.