Halloween returns to life in a new adventure based on the series of children’s books with the same name of R.L. Stine. The sequel revolves around three friends who have to stop Slappy The Dummy from starting the Halloween apocalypse. In the small town of Wardenclyffe, on Halloween night, two boys named Sonny and Sam find a manuscript called “Haunted Halloween” in an abandoned house formerly owned by R. L. Stine. When they opened it, they released him without knowing Slappy, who intends to trigger a Halloween apocalypse with his monster allies. Friends accidentally encounter a new wave of trouble led by puppet Slappy. Now, Sonny, his sister, Sarah, and Sam have to work together to counteract Slappy’s plot before everything is lost.