The trailer introduces Esther, an orphan girl adopted by Kate and John who seems innocent but odd. Her behavior becomes increasingly disturbing and dangerous, as she torments the family's other children, causes accidents, and seems to be taking over the family. It's revealed that Esther has a secret, and the trailer builds tension to reveal what her secret is and how far she will go to destroy the family. Shots of violence, screaming, and threats escalate to leave viewers desperate to learn Esther's secret and see if the family can survive her in the film.