Except for reading the Kiel Gnomenfoot magic adventure series, Owen's life is boring until he sees his classmate Bethany climb out of a book in the school library and he learns that Bethany is half-fictional and has been searching every book she can find for her missing father, a fictional character.

Aided by old friends and new, Own and Bethany try to bring the light back to Jupiter City, a comic book world where they discover a link between the Dark and Bethany's father.

After Nobody destroys the connection between fictional and nonfictional worlds, causing nonfictional people to lose their imaginations, Owen and Bethany must risk everything to save multiple realities.