Out on the muddy outskirts of Buenos Aires, 11-year-old Delfin dreams of playing the French horn in a children's orchestra that is being formed in a nearby town. He lives alone with his father in a ramshackle house, from which they could be evicted at any point, and splits his time between school and helping his father make ends meet. But nothing will stop him from taking part in that audition, he just has to figure out a way to get there and follow his dream.