The story of the founder of Basque nationalism Sabino Arana Goiri. The first time that the biography of the politician who, although he lived only 38 years, has been one of the most influential figures in the history of Euskadi, is approached in the form of fiction. The film aims to delve into the keys to the thinking of the father of Basque nationalism, and to describe an era and a generation of people, as essential and tumultuous as unknown in the history of the Basque Country.