Superman brings a new engine for the Bat-jet to the Bat-cave. However when Batman opens it up he finds the Riddler hiding inside. He hops out and spritzes Superman, Wonder Woman, Batman, and Robin with stupid spray. There's only one antidote and the Riddler has hidden it somewhere and if the Super Friends do not find it before the time limit is up they will be super stupid forever. Before he hops away, the Riddler gives the Super Friends their first Riddle clue. The Super Friends arrive at the Mayan ruins in Chichen Itza, there Superman spots what he believes is the antidote in the pyramid by using his X-Ray vision. The Super Friends enter the pyramid only to be caught in a Riddler trap. They escape the trap they find the Riddler's second clue but by that time they need the assistance of the Bat-Computer because they had become too stupid to figure out the riddles. The computer tells them to go to Mt. Everest and there they defeat the Riddler and get the antidote.