TSR documentary on the 1979 expedition to Algeria in the Atakor massif (Hoggar desert), organized by Geneva mountaineer Michel Vaucher and Jean-Blaise Fellay. The climbers make a dozen ascents including the famous summit of Adaouda (which means "finger" in Tamasheq, the Tuareg dialect), by several routes. Then a new route on the peaks of the southern Tezoulegs. They discover the volcanic geological characteristics of the Atakor massif and meet the nomadic inhabitants of the region, the Tuaregs, who are increasingly settling in the town of Tamanrasset.