When the carnival comes to METROPOLIS, BEPPO THE SUPER-MONKEY isn't far behind. This CHIMP OF STEEL can't wait to chow down on chocolate-covered bananas and other fair foods. Unfortunately, the world's evilest ape, GORILLA GRODD, has other plans. He wants to turn this festival of fun into a day of destruction. With a little help from the WONDER TWINS and their space chimp, GLEEK, BEPPO must somehow stop GRODD'S midway monkey madness.