Meet George and Harold, a couple of wise guys. The only thing they enjoy more than playing practical jokes is creating their own comic books. Together they have created the greatest comic-book superhero in the history of their elementary school - CAPTAIN UNDERPANTS! But George and Harold's principal, mean old Mr. Krupp, doesn't like their pranks OR their comic books. He's cooked up a plan to catch George and Harold and stop their shenanigans - once and for all! This book is about what happened when that plan backfired, and Captain Underpants leaped off the page to save the day!