In the mid-80's two young climbers attempted to reach the summit of Siula Grande in Peru; a feat that had previously been attempted but never achieved. With an extra man looking after base camp, Simon and Joe set off to scale the mount in one long push over several days. They reach the peak within three days, however on their way down, the pair struggle together and alone, to survive their rocky descent. In a series of twists and turns on their mission to make it home alive, this is the story of how they survived the mountain.