The feat of three young Aosta Valley mountaineers on the Mont Blanc massif. The film recounts the first ascent of Couloir Isaïe (M8 - 7a/7a+ - AI5, 600m), on the West Face of Aiguille Noire du Peuterey by François Cazzanelli, Emrik Favre and Stefano "Teto" Stradelli, on 12 and 13 February 2023 Their adventure is also an opportunity to reflect on the evolution of contemporary mountaineering and on the younger generations.