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.

After moving to a new small town, teenage Zach Cooper meets the beautiful girl next door, Hannah. 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, the author of the bestselling "Goosebumps" series.

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 to put all the monsters back in their books.