A mother moves into an old family home to undergo a rigorous treatment that she hopes will help her autistic daughter communicate. The therapy seems successful when the girl miraculously begins to speak. However, she soon discovers that her daughter has come into contact with the tortured entities of the place, who return from beyond to collect a dark debt from the past
Mario, a keen birdwatcher, but unable to drive, offers to pay a man he just meet to drive him from Valencia to Romania. Neither of them is aware of the other's story, but a new and definitive journey starts for both of them.