Sixth grader Nate Banks, who's obsessed with comic books, leads a normal life until he discovers his history teacher may be a superhero.

As the three-time winner of the Ultimate Comic Book Trivia Championship of Knowledge, Nate Banks has always been the sixth grade's biggest comic book expert. But when a mysterious new superhero shows up in town, not even Nate knows who she really is. And when he sets out to discover Ultraviolet's secret identity, all of the clues seem to lead Nate to the least likely suspect-his uptight history teacher, Ms. Matthews! Could she really be moonlighting as a super-powered crime fighter? It's up to Nate to find out!