In 1966, 800 workers from the Biscayan company 'Laminación de Bandas en Frio' carried out the longest strike of Franco's dictatorship. In a tumultuous historic moment within the framework of growing organization of the working class and anti-Franco sentiments, hundreds of residents of Etxebarri, Basauri and Otxarkoaga launched a political struggle that would end up being an example for the entire labor movement that would follow. Through the main characters and their stories, anecdotes and experiences, we create an image of the 163 days of strike that made the dictatorship's foundations shake.