George and Harold aren't bad kids. They just like to "liven things up" for everybody. Unfortunately, their thoughtful jokes sometimes get them into a LOT of trouble. And when Professor Pippy P. Poopypants becomes their new teacher... well, George and Harold almost caused the entire planet to be taken over by a maniacal, mad-scientist guy in a giant robot suit. Who will stop the perilous planet of Poopypants?!!!? This looks like a job for Captain Underpants.