Valentine Fabre and Hillary Gerardi, two high-level complete athletes, take on the challenge of establishing the first female record on the non-stop Haute-Route, a legendary ski mountaineering endurance race linking Chamonix to Zermatt in 100km and 8000m altitude difference. A feat that the two women take on, as much for personal reasons as for the representation they offer by achieving this great female first.

Living in Chamonix means observing Mont Blanc all the time. It's such an iconic summit." For several years, athlete Hillary Gerardi has shone on the podiums of the biggest trail races, but her gaze is set on high altitude. Victim of a terrible accident a few years earlier, she questions her legitimacy as a mountaineer to measure herself against the most prestigious mountain running record. The round trip starting from the church of Chamonix, the capital of mountaineering, to the summit of Mont Blanc. Secretly, Hillary has dedicated her last three years to this meticulous preparation, but that was without counting on climatic hazards that are much less controllable than her own determination... On the eve of the International Year of Glacier Preservation in 2025 (UNESCO), this inspiring film harmoniously combines the sporting performance of Hillary's record and the awareness of the importance of glaciers through the speech of glaciologist Heidi Selvestre.