A very interesting incursion by Jorge Grau in the Quinqui trend (a Spanish young delinquents subgenre), that switches the traditional point of view of these films from the aggressors to the victims. That makes the movie a little more conventional (it's much easier to empathize with the victims) and with the social message more prominent, but the powerful direction of Grau, the dark mood and the excellent acting all around makes up for it. It's a slow burner but with a big finale.