Documentary that addresses the conflict between cattle ranchers and wolves. The film takes us from Sierra Morena to the peaks of the Cantabrian mountain range. There, the tracking of a pack of wolves begins, narrating their daily life. The locations where the story takes place are in different natural areas of Castilla y León and Andalusia. Specifically, in the Babia y Luna Natural Park, in the Picos de Europa Regional Park, in the Fuentes Carrionas and Fuente Cobre Montaña Palentina Natural Park, in the Sierra Norte de Sevilla Natural Park and in the Sierra de Cardeña Natural Park.