George and Harold have pulled off some incredible pranks in their time, but their latest stunt in the school cafeteria has caused a cosmic disaster. By accidentally ruining the lunch ladies' food, they cause the staff to quit, opening the door for three incredibly naughty aliens to take their place. These extraterrestrial cafeteria workers are not here to serve sloppy joes. They have a sinister plan to turn the entire student body into a legion of evil, super obedient zombie nerds. Soon, the school is completely overrun by mindless students, and the world is in grave danger. It is up to George and Harold to fix the massive mess they created. Can they snap their classmates out of their trance, defeat the tentacled lunch ladies, and save the planet with the help of Captain Underpants? Put on your capes and prepare for an out of this world adventure.