M.A.D. gains control of Metro City's banks, by tapping into an orbiting satellite. With the added distraction of "Crazy Gas", a substance that induces hallucinations in their victims, can even Inspector Gadget ever hope to regain control of the city's bank accounts?

Inspector Gadget, Penny, and Brain travel back in time again -- on this occasion, to ancient Rome to prevent Dr. Claw's own time traveler, Thelma Bodkin, from deciphering an ancient mosaic and stealing the treasure it describes.