After giving birth to a stillborn, a couple adopts a little Russian girl named Esther. Their new daughter is violent, murderous, and manipulative. The audience later learns in a major reveal that Esther is not a little girl, but a woman with a disturbing past. If you're not convinced about how creepy the main character is, Isabelle Fuhrman's performance as Esther has been compared to Linda Blair's in The Exorcist and Patty McCormack's in The Bad Seed.