Black Litter (1977)

Tatin (José Luis Alonso), a young man of fourteen, admires his brothers and wants to be like them: member of a right-wing band. But everyone laughs at him for considering him only a child. And they refuse to take you with them to perform their deeds. Tatin meets Rosa, a girl older than him, the only one who listens to him and gives him a little affection. But Tatin believes in the duty to fulfill the three conditions he once heard his mother say, a fanatic. And the third condition is directed against Rosa.