In June 1986, Patrick Gabarrou and Hervé Bouvard opened the Walker Directissime in the Grandes Jorasses north face. A masterpiece of difficulty in a 1200 m big wall.Nobody tried it since 37 years. In February 2023, three French mountaineers try to free climb it and to make the first winter ascent of this route. That’s the story of Charles Dubouloz, Symon Welfringer and Clovis Paulin, spending 5 days in this giant Freezer.