After moving to a new small town, teenage Zach Cooper (Dylan Minnette) meets the beautiful girl next door, Hannah (Odeya Rush). But every silver lining has a cloud, and Zach's comes when he learns that Hannah has a mysterious dad who is revealed to be R. L. Stine (Jack Black), the author of the bestselling Goosebumps series. It turns out that there is a reason why Stine is so strange - he is a prisoner of his own imagination - the monsters that his books made famous are real, and Stine protects his readers by keeping them locked up in their books. Zach unintentionally unleashes the monsters from their manuscripts and they begin to terrorize the town. It's up to Stine, Zach, Hannah, and Zach's friend Champ (Ryan Lee) to put all the monsters back in their books.A teenager teams up with the daughter of young adult horror author R. L. Stine after the writer's imaginary demons are set free on the town of Madison, Delaware.