Nick and Karyn Hayes buy an old farmhouse for them and their three children. Strange things start happening with the spooky vents, leading the younger children to claim monsters live inside. Things gradually escalate, including sudden bruises appearing on young Lily. Her grandparents believe that Nick may be abusing her, despite Nick and Karyn insisting that isn't true.
Casey, the eldest child, is left in charge of her siblings while the parents go out one night. The evil that lives in the vents seizes the opportunity to go after the younger kids, forcing Casey into a battle against an unrelenting force in order to save them.
Casey, the eldest child, is left in charge of her siblings while the parents go out one night. The evil that lives in the vents seizes the opportunity to go after the younger kids, forcing Casey into a battle against an unrelenting force in order to save them.
