In 1975, Raymond Renaud, Yves Pollet-Villard, Maurice Gicquel, Maurice Cretton, Jean Coudray, Yvon Masino, Walter Cecchinel, all teacher guides at ENSA in Chamonix, with the help of the Indian Mountaineering Foundation, set out to cross the 2 peaks of the highest mountain in India. After 43 hours in a truck, 10 days of slow and difficult approach walking, helped by goats for the portage due to lack of sherpas, the base camp is set up on the Nanda Devi glacier. Two groups share the two eastern and western slopes, 3 kilometers separate them: the goal being to meet between the two summits by the ridge. But on the big day, with the monsoon, bad weather arrives with wind and snow, we will have to give up. Like the French expedition of 1951 which lost two mountaineers, Roger Duplat and Gilbert Vigne, to whom Paul Gendre and Louis Dubosc pay tribute.

Three years after the 1959 expedition, abandoned 350m from the summit, Lionel Terray leads a new assault on Jannu, one of the most demanding peaks in the Himalayas. At the base camp, equipment and food rations are prepared. The conditions are optimal and the ascent can begin. The camera follows the progress of the mountaineers and Sherpas as closely as possible, from one high-altitude camp to another: installing fixed ropes, progressing over crevasses, in the middle of frozen towers, vertically down immense ice falls or along the edge of sharp ridges. From 7000m, oxygen bottles become essential, as the difficulty of the climb prevents acclimatization. The expedition is a total success: the majority of its members reach the 7710m summit.

Retrospective of four major peaks climbed by French expeditions: Annapurna (8078m) in 1950; Makalu (8481m) in 1955; Mustagh Tower (7273m) in 1956 and Le Jannu (7710m) in 1962. A film by Lucien Berardini and Jean-Marie Perthus with the support of the French Alpine Club and the FFME (French Mountain and Climbing Federation).