Making of the cinematographic shooting of "Premier de Cordée" directed by Louis Daquin in the Mont-Blanc massif. In 1943, Alain Pol accompanied a team of seventy people (directors, technicians, interpreters, guides and porters) who reached the high mountains. Leaving from Chamonix, they take the Montenvers train, cross the Mer de Glace and reach the Requin refuge. He films a risky adventure of cinema and mountaineering which is organized through the reliefs of the glaciers, the corridors and the highest points of the mountain. The images of the making-of reveal some of the adventures of the actors and technicians: rock falls in the corridors, crossing glaciers and long approach walks at altitude to the filming locations. On the images shot by Alain Pol, we also see the various members of the film crew (70 people in total) try their hand at abseiling with more or less confidence. Six actors and technicians will also be injured and the main role - that of Pierre - will be reassigned to André Le Gall (at ease rope in hand) following a bad fall by Roger Pigaut.