Facing some of the most challenging terrain in the world, world-class athletes Valentine Fabre and Hillary Gerardi attempt to become the first women to ski the Haute Route non-stop from Chamonix to Zermatt. For Valentine, the Haute Route has deep personal resonance, as her husband set the men's record shortly before a fatal mountain climbing accident a decade ago. Completing the route would be the ultimate tribute to his memory. When Valentine met Hillary, she found a capable partner for this arduous and emotional journey. Despite being relatively new to ski mountaineering, Hillary has vast reserves of stamina that carry over from her career as a professional mountain runner. Together they set out on this non-stop 100-km traverse, climbing 8000 m over some of the most beautiful high-mountain terrain in the world. Will their months of training prove to be enough for these women to set the record?