Touching the Void is a 2003 documentary based on the book of the same name by Joe Simpson about Simpsons and Simon Yates disastrous and near fatal attempt to climb Siula Grande 6,344m in the Cordillera Huayhuash in the Peruvian Andes in 1985.
Both climbers successfully reach the summit of the previously unclimbed West Face of Siula Grande in Peru. Joe is injured during the descent after falling, resulting in a badly broken leg. The pair decide to lower Joe with the help of ropes on the steep snowy slope, while an enormous storm rages on. Simon cannot see where he is lowering Joe and Joe eventually drops off a cliff and is suspended by the rope in midair. Simon arrests his fall, but neither sees the predicament his partner is in nor hears him, due to the severity of the storm.After about an hour, Simon realizes that there is little chance of recovery from this situation for either of them and he makes the decision to cut Joes rope. After surviving a subzero and stormy night on the mountain, Simon descends, but cannot find his partner. He decides his partner is dead, and returns to the base camp alone, where he stays to recover. ........
Source: Wikipedia