When Gabbi moves home from a year abroad to have senior year with her friends, she plans to get her old life back, none of which includes stumbling upon the power to enter into the books she reads with her chaotic best friend. And while senior year AP Lit and "The Great Gatsby" suddenly become a lot more interesting, they quickly realize that they've accidentally been changing the book and must figure out how to fix things before "The Great Gatsby" and their world are changed forever.