Julia and her three best friends go on an adventure through the region of Cortazar, Guanajuato on El Cerro de Culiacán where they meet 'El Diablo' a forty year old man who played with black magic and was the son of witch parents. He is accompanied by his lackeys 'Los Nzahki' demons with whom the Otomi spoke who represent hypocrisy and disease. Both play a strong role from envy, tares, fear and everything against these young people who only wanted to live the anecdote of camping and learning new things together, as usual.