oy is a fable about courage and youth. It tells the story of Luiza, 16 year old girl, who can not stand to hear about the end of the world… On a Christmas night, his cousin John is mysteriously shot in a street in the Lowlands and disappears into the night. Weeks later, while Luiza spends days alone in the apartment where he lives with his mother in Rio de Janeiro, a mysterious visitor comes knocking on your door: John, as a ghost, asking to hide there.

Overview from themoviedb.org