Inspector Gadget is a clumsy, dim-witted human cyborg detective with various bionic gadgets built into his body. Gadget stumbles around working the cases while his niece and dog do most of the investigating. Gadget's arch-nemesis is Dr. Claw, the leader of an evil organisation, known as "M.A.D."
While searching for a crime-fighters' convention in Transylvania Gadget arrives at a castle that Dr. Claw has booby-trapped to kill him.
Gadget enters the Gadget Mobile in a race and finds that Dr. Claw has also entered with a plot to eliminate him and his competition by sabotaging the other race cars.
Gadget is sent to India to investigate a missing ruby, which has been stolen by M.A.D. to be used as an amplifying power source for a laser beam that will destroy an advanced satellite in space.
Gadget has to guard the life of famed rock singer Rick Rocker, whom M.A.D. has sinister plans for. But Gadget winds up replacing Rocker as the current reigning King of Rock!
Gadget is assigned to find El Dorado, the fabled Lost City of Gold, before Dr. Claw's agents find it and tear it apart to melt down the gold.
Gadget falls for actress Lana Lamour unaware that she's a M.A.D. agent and that her movie is M.A.D.'s cover for filming top secret facilities.
