The people living in harmony with nature in the peaceful lands of Gandahar are shaken by strange events unfolding at the border. In this universe where nature and technology intertwine, the gradual petrification of citizens in distant regions one by one threatens the idyllic order. In this animated film for adults, René Laloux invites us into a visual poem that drifts through the realms of surrealism, while laying bare the fragility of the concept of utopia. Sylvain sets out on a long journey into the unknown to resolve the looming threat of invasion.