A young couple, Phil and Kate, move to a secluded house in Los Angeles with their newborn son. As they settle into their new life, they hire a charming and seemingly perfect nanny named Camilla to help care for their child. Initially, everything seems to be going well; Camilla proves herself to be competent and attentive, fitting seamlessly into their household. However, strange occurrences and unsettling phenomena begin to plague the couple, leading them to suspect that Camilla is not what she appears to be.

As Phil and Kate dig deeper into Camilla's background, they uncover chilling secrets about her past and her connection to an ancient, malevolent force linked to a nearby forest. Tension builds as they grapple with the realization that Camilla harbors a sinister agenda involving their baby. With mounting dread and urgency, the couple must confront their fears and protect their child from a looming supernatural threat that defies their understanding.