Un Désert Vertical immerses us in the world of rock climbing in Mali, West Africa. Under a scorching sun, amidst stifling heat, sand in one’s eyes, and moisture rapidly evaporating from the body—Mali tests even the strongest spirits. The Haut Gourma region, wild and filled with unexplored routes, is an ideal setting for modern rock climbing. Led by Daniel du Lac, this Sahelian adventure is a journey of encounters, discoveries, and pushing one's limits. The film also delves into the culture of the people living in the mountains and bush of the Gourma, providing a backdrop for this quest of exploration.