Gadgetmobile, Gadget's longtime talking car and partner has been breaking down on the job and, to Gadget's disappointment, removed from service. At the same time, a suave, Bond-ish competitor, Devon Debonair, comes on the scene and starts stealing Gadget's thunder. Every time there's a crime, Debonair is there ahead of Gadget to solve it and get the praise. Debonair even grabs the old Gadgetmobile from a "used super-car" lot, fixes him up, and renames him the "Debonair-mobile." Gadget's former car, still hurt from being thrown over for a younger model, willingly goes along. And Gadget is being made to look so bad, that soon he is the one being replaced. Devon Debonair is declared Metro City's official crime fighter. Gadget, his spunky niece Penny and dog Brain must uncover the dark secret behind Devon Debonair in time to save Metro City...and Gadgetmobile.