In the early seventies, which was practiced mountaineering in the Himalayas he suffered a concussion. The concept of a normal path gave way to the big walls. These giant climbs needed large artificial logistical and technical means, including the use of oxygen and many end supports as “sherpas”. From the time they were great routes: the south wall of Everest, the south face of Annapurna or the south side of Nanga Parbat. Perhaps the most aesthetic of all, which rises like an arrow of rock into the sky, is the west pillar of Makalu. The climbing team of Al Filo de lo Imposible try to attack it by giving up large groups and teams EFFECTIVE PRODUCTION oxygen in an attempt to unite the old idea of ​​the great walls with the ethics of the times. Additionally, this drive another documentary on the ascent of K2 is included. A summit after several failed expeditions over eleven years, was crowned by the team of Al Filo in 1994, albeit at a very high price, the death of mountaineer Atxo Apellaniz.