exico 1914. During the Revolution, a raid by the army in a small mining town leaves Gapo, 11, orphaned. Taken captive to be turned into a child soldier he escapes with the help of Juan Escopeta, a gunman for hire. Together they travel through a country absorbed in civil war in search of Gapo’s older and only brother: a famed revolutionary outlaw.

Overview from themoviedb.org