A teacher is fed up with the two main characters George and Herald's pranks and quits his job so the school hires a new teacher named Professor Pippy P. Poopypants who everyone makes fun of. But when Professor Poopypants reads a comic George and Herald made about him turning his invention into a giant robot and hops inside it being the villain so he actually does it ..So like in the comic with a snap of the fingers will Captain Underpants lose his power? or defeat and stop the perilous plot of Professor Poopypants?