Desperate to prove his theories, Harold performs an unauthorized ritual using hypnosis and EEG feedback, intending to project his consciousness into the boy’s mind. Instead, he tears a hole between worlds.

Their lives change when they are called to a rural Pennsylvania farmhouse. A five-year-old boy, , has inexplicably fallen into a coma-like state. His body remains alive, but his eyes are wide open—black as coal. Doctors are baffled. The boy’s grandmother whispers of an old spirit door in the attic, sealed shut with salt and iron.

Renai hears a music box from the baby’s room. She enters, finds nothing, and turns to leave. A shadow of a small boy runs behind the crib sheet. She pulls back the sheet — he’s gone. Then she turns to the doorway, and he’s standing there, pointing toward the closet. No loud noise. Pure, skin-crawling dread.

The film’s horror unfolds in two planes:

In a devastating climax, Harold realizes the only way to save Samuel is to offer the demon a more tempting soul: his own. He tricks the demon into taking him, buying Samuel’s escape. But before the boy wakes up, Harold whispers a warning into his mind: “Never go back. And never let them call me.”