George and Harold are usually responsible kids... Whenever something bad happens, George and Harold are usually the ones responsible!

And now, the terrible duo has struck again! First, George and Harold sabotaged their classmates' inventions for the Second Annual Invention Contest held at their school. Then, they accidentally created a ravenous army of evil talking toilets that want to take over the world. Who will step up to stop these insane carnivorous monsters? It's time for Captain Underpants to take action!