The Mer de Glace in Chamonix, November 86: every summer the meltwater that runs on the surface of the glacier flows into a huge crevasse called "a mill". In 1897, Joseph VALLOT had explored it to a depth of 60m, a lake had prevented him from going any further. Since then no one had descended into this well. In the fall, a multidisciplinary team made up of mountaineers including Jean Marc BOIVIN, speleologists and scientists descending into the crevasse... Superb images and live comments in a temperature of 0° and a humidity of 100%. The team reached 110m deep under the ice, a world first in glacier exploration. Jean marc BOIVIN seems delighted with his first speleological exploration. With the participation of Serge AVIOTTE, Jean Michel ASSELIN, Jean Marc BOIVIN, Janot LAMBERTON, Pierrot PILLET, Louis REYNAUD, Jean Luc RIGAUD and Denis TERMIER.

What compels a man to push the limits of what is attainable ever higher? After thirty years of relentless struggle with the highest peaks on earth, Marc Batard has finally found the answers to these questions. He had to reach the summit of Everest twice, once shattering the record for fastest time in 24 hours without oxygen, and climb the most difficult faces of the Alps to glimpse the path to inner healing. It was through physical suffering that he was able to confront the pain of his soul. He was finally able to talk about the violence of his childhood, the shock he carried like a ball and chain for decades. Having completed his summit therapy, Marc Batard tells his story in this documentary by Gilles Perret.

To understand the difficulties of an ascent to over eight thousand metres, it is enough to remember the almost 300 victims these peaks have claimed. The Swiss alpinist Ehrart Loretan, the third alpinist in the world to have climbed all 14 8,000, and the Austrian alpinist Kurt Diemgerger cover the whole history of the conquest of the world’s 8,000, from the fifties to the present day, together with other alpinists and film directors who have climbed them. They talk about their experienced when they ventured into the death zone.