A chronic sleepwalker reads from a mysterious text that foretells his impending demonic possession. He struggles to hold his family together as the ancient evil threatens to consume everything he holds dear.

The architect Dana, her husband David and their son Lucas move to an isolated manor in the countryside seeking a restart of their lives after the death of their baby daughter in a tragic accident. Dana overhears noises in the attic and finds a hidden locked room. Soon she finds the keys and is haunted by the evil spirit of an old man. She researches and learns that old rural houses had disappointments room where retarded and deformed children were locked to avoid embarrassment to the traditional families. Further, the spirits of the original owner of the house, Judge Blacker, and his daughter are still trapped in the house. However, only Dana is capable to see and contact them and David believes she is delusional. When Judge Blacker threatens the life of Lucas, Dana tries to protect him but she is not sure of what is reality or daydream.