If you are curious about Argentine cinema, start here.
There was before Pizza, birra, faso, and after. This is the masterpiece of the New Argentine Cinema. It was the first feature-length film in the genre. Among its innovations are the use of non-professional actors, continuous shots, location shoots, the use of language of the streets, and a deliberate attempt to make the film appear unstudied.
The film tells the story of a group of friends living a marginalized life on the streets of Buenos Aires as the city descended into poverty and crime in the 1990s. It is as good as the best of the Italian Neo-Realist movement of the 1940s and 1950s. It tells the story from the perspective of the friends, using their language of the street, without sentiment and without becoming manipulative. It's a story of good people trying to survive in a merciless society.