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.