For the protagonist of this film by the Argentinian director Natalia Meta, nothing is more precious than her voice. Ines earns her living from dubbing films, and in her free time she sings in a choir. Her mental health starts deteriorating because of unsettling dreams that are difficult to interpret.
The situation gets worse due to a tragic event that takes place during a holiday trip. Ines is devastated and to make matters worse, she starts losing her voice. Her condition is difficult to diagnose, though some insist that the cause is not a disease, but a supernatural power – the intruder – that attacked Ines in her sleep.