This series is about "Gadget Boy", a bionic kid-detective with a personality similar to that of Inspector Gadget. Just as maladroit as the original Inspector Gadget, Gadget Boy was usually bailed out of situations by the more practical Heather, though he was also helped greatly by his myriad high-tech gadgets and extendable arms and legs. Gadget Boy's bionic implants were installed by Switzerland-based inventor Myron Dabble (voiced by Maurice LaMarche) who has an unrequited crush on Heather. Gadget Boy and Heather receive their assignments from Italy-based Chief Stromboli (voiced by Maurice LaMarche), who, much like Chief Quimby, is a frequent, long-suffering victim of Gadget Boy's bungling. Gadget Boy is assisted by the beautiful and resourceful agent Heather (voiced by Tara Charendoff), a very tall equivalent of sorts to Penny (the difference being that Heather is in her early 20s). He is also assisted by a robotic dog named G-9 (voiced by Maurice LaMarche), who serves as the "Brain" of this series, which shows through his morphing capabilities to get the gang out of the stickiest situations.