Marga, who’s in the middle of a marital crisis with her husband Daniel, decides to spend a few days alone in her old, family home. Once there, she starts to sense some strange and terrifying phenomena happening around her: an invisible entity seems to know a lot about her, among other things, that she’s having an affair with Carlos, an old friend from college.  Marga has fallen pregnant by Carlos and on the day she’s going to have a secret abortion, the entity won’t let her leave the house. On the verge of madness, Marga discovers a portal in the house that leads to another reality. In this reality lives her other self and she’s actually trying to warn herself that something terrible is about to happen to her, unless she makes a decision…