El pico (1983)

Bilbao, 1980. A right-wing Civil Guard Commander discovers that his 17-year-old son Paco, who he hopes to enter Military Academy, is a heroin addict like Urko, Paco's best friend and the son of a leftist leader. Paco runs away from home taking a gun from his father. While the Commander initiates the search of his son accompanied by the father of Urko, he begins to discover an unknown world and little by little important changes take place in him.