When thirteen-year-old Cassie Keller (Emily Osment) was going to the library, she caught a glimpse of a Halloween store and the store owner gave her a book entitled The Evil Thing. On its front page was the warning DO NOT READ ALOUD. Cassie ignores the warning, and reads it to her younger brother, Max. The Evil Thing is later brought into reality and kidnaps Max when he started to think about it. It also captured Priscilla and a nameless pizza delivery man. They were to be food for the Creature's offspring when they were born.