On the border between Argentina and Chile, Katia Lafaille, widow of the mountaineer Jean-Christophe Lafaille, sets out on one of the hardest treks in the world. Thirteen days of joy and suffering, to conquer the summit of Mount Aconcagua, the 'Colossus of America', which stands at 6,962 meters... Trek movie, a roadmap of an exceptional human adventure, the film is to see for the breathtaking beauty of the landscapes and for the will of this woman who seems to have some accounts to settle with the mountain.