Alonso Duarte (illustrator), Cristián Ochoa (editor)
In the depths of the cavernous hill lives a sinister being. Marco Antonio Guerra, a 10-year-old boy, longs to be a great soccer star. However, his dreams are interrupted by the serious illness of his father, a miner from Cerro Rico (Bolivia), one of the tallest mines in the world. Marco will have to make the most important decision of his life, whether or not he will face the evil metallic being that tears at the walls of the mine tunnels.