In some of the most extraordinary natural landscapes in Mexico, a group of mountaineers have set out to explore a world labeled as impossible, but from a space reserved only for birds.

Manuel, an old man with terminal cancer, is afraid of leaving his son Simón, a young man with a profound cognitive disability, behind after his death. The old man exhausts the possibilities he has to find someone to take care of the boy, but it is the unexpected arrival of a fugitive, Roberto, who seems to give him a hope very different from the one he had considered.