Teddy, Grubby and Gimmick are invited to a Logic Fair hosted by King Nogburt. Gimmick gets horribly depressed because none of his inventions ever work. Meanwhile Grubby has been conned by Tweeg in disguise over Grubby's recipe for Root Beer. On their way to the Logic Fair, Frank and Faye Fob survive an earthquake which separates them from their babies. Teddy, Grubby and Gimmick hear the Fobs' cries for help and land near Trembly Fault to help. The three friends successfully rescue the Fobs after Gimmick uses an accordion to create a makeshift bridge to rescue Frank and Faye. At the fair, Grubby recognizes Tweeg and that he has been conned. Unfortunately Tweeg is goaded into shaking up his barrel of the beverage until it explodes, and the truth is revealed.