In the heart of the Écrins mountains, a white wolf and a shepherd exhaust themselves fighting each other before making a pact and finding a way to live together. Once again, Rochette celebrates the high mountains: their beauty and violence, and the commitment and humility it takes to survive there. He also tries, through fiction, to find a way out of the irreducible conflict between two points of view, both eminently justifiable: shepherds who want to protect the lives of their flocks and rangers trying to save endangered species.