A new villain named Massive uses his ability to control gravity (having the ability to make objects and people lighter-than-air or massively heavy) to commit several robberies all over Acmetropolis. His goal is to use the robberies to make as much money as he possibly can. Meanwhile, the citizens and the Loonatics are getting ready for the championship game of a futuristic sport known as "basherball" (which resembles the Harry Potter series' game of Quidditch) at the Acmetropolis World Dome. When Massive plots to steal the basherball championship trophy, the Loonatics head to the game to stop Massive's crime spree.