Dr. Claw kidnaps Professor Von Slickstein - the brilliant scientist who gave Gadget all his gadgets. With the gentle old man tied up and gagged in the back of the MAD Mobile, Claw heads to the airport with Gadget in hot pursuit. The evil genius evades Gadget and a police roadblock and succeeds in escaping to South America with the professor. Gadget follows on a cargo plane and is dropped into the jungle as is the parachuted Gadgetmobile - with stowaways Penny and Brain inside. On the ground Gadget first encounters a huge albino gorilla, and then Amazon Annie - a shapely female MAD agent with a "tribe" of six other agents ready to do him in. Meanwhile, in an ancient Aztec pyramid, Claw has set up shop and is forcing the kindly scientist to create an army of robots. The result: androids that resemble Gadget but move with the feeble, hunched-over mannerisms of their maker, the professor. Incensed, Claw demands that Von Slickstein reprogram them to do his bidding. Penny quietly gets the Professor's ear and has him demand that Gadget be used to instill them with his brainwaves. Dr. Claw reluctantly stops Annie's "ritual sacrifice" of Gadget and has the Inspector brought to the makeshift lab. Clamped into the brain-transferring apparatus, all seems lost for Gadget - until a well-thrown banana encourages the huge white ape to take Gadget's place. The robots suddenly come to life, violently destroying the lab like a mob of crazed gorillas!