Dubbed the Ninth Wonder of the World, Jonas Venture's space station, Gargantua 1, has developed a problem, and it's up to Dr. Thaddeus Venture to fix his father's creation. But could the station be haunted by vengeful ghost?

Dr. Venture takes the X1 to "Brisbyland" for a meeting with the theme park owner Roy Brisby. But the boys get kidnapped by the "Orange County Liberation Front" and Brock and his former lover and secret agent Molotov Cocktease mount a rescue.