The synopsis tells how the story of how something is haunting Andrea (played by Expósito), but no one, not even she herself, can see it with the naked eye. Twenty years ago, ten thousand kilometres away, the same presence terrorised Marie (Ollivier). Camila (Villa) was the only person who could understand what was happening to her, but nobody believed them. Faced with this oppressive threat, all three hear the same horrific sound: crying.