La artillería de Mr. Smith (Una historia perfecta)

Balaguer, 1938. The Civil War is raging across the Segre river, but Xavier feels safe and goes out on his bicycle every day to explore the village and its surroundings. On one of these trips he befriends Mateo, a sixteen-year-old boy who is the son of an anarchist and is about to join the front. When Xavier, the son of an engineer under the command of Franco, discovers the secret weapon that his father has helped create to wipe out the Republican side, he faces the biggest dilemma of his life.