An impressive climbing feat, in a remote and wild place. Edu Marín, with his father Francisco "Novato" and his brother Álex, embarks on an extremely ambitious adventure: to free one of the most difficult and overhanging routes in the world, the immense roof (304 m) of the Grande Arco in the Gétû Valley in China. A story of joys, cries, unexpected obstacles, adverse weather and friendship.