Two young adults, Clara and Hidalgo, meet in the Verdon canyon. Everything opposes them: interests, skin color, openness to others. Hidalgo decides to relive, a hundred years later, the adventure of Édouard-Alfred Martel, the first explorer of the Verdon canyon, when Clara comes to hike in the region. This meeting, at a turning point in their lives, will allow them each to live a strong experience that will mark them for a long time...