When new parents Alex and Penny escape the city for a more secluded home, the overwhelming stress and severe lack of sleep from caring for their newborn lead them to perceive unusual occurrences in their residence. Both begin to notice a mysterious woman, leaving them to question whether they are experiencing hallucinations or if their new abode harbors a sinister, otherworldly force. As their tenuous hold on reality unravels into madness, Alex and Penny become almost powerless to confront the terrifying reality of what is truly happening in their home.