Young girl Polly and her father Mark move into a new house where Polly finds an old nursery rhyme book that was left behind. After reading the book, Polly becomes possessed by the spirit of a scary woman who used to own it, and begins acting out the hidden and disturbing meanings behind the nursery rhymes. The film will be influenced by the psychological thrillers Shutter Island, Arlington Road, Seven, Psycho, and Insidious, and will feature montage sequences of woods, a library, Polly's room, and scenes from inside the nursery rhyme book.