Gadget and Penny are in Italy. However, Chief Quimby gives Gadget an assignment. It tells him that Dr. Claw is planning to steal a priceless artifact known as the Golden Pizza. Gadget has to join an opera to find and stop the M.A.D. agents from stealing the Golden Pizza. Plus, another agent is planning to use his "singing" plant to help Dr. Claw steal the Pizza. Gadget must stop Dr. Claw from stealing the Golden Pizza and destroy the singing plant.
—John Wiggins