In the front room of the house with two front doors, Watson Conqruent's father sells souvenirs from the long-canceled TV show, The Adventures of Captain Conquer. In the back room, his father is building a "motivator" like the one that powered the Captain's huge stratoship, the Great Auk. And out front, a mysterious excavation grows larger every day, under the direction of the sinister Charlesville Planning Commissioners.
Then one day, Watson comes home from school, only to find both house and father vanished. As the Captain would say, "It's time to throw out the interlocks!"
With the help of a troop of eccentric Captain Conquer fans, including a man who claims to have 40 pounds of brains in his nose, Watson sets out to find his father - and not so incidentally, to rescue the Earth from alien creatures who want to turn our atmosphere into something that is almost exactly like (or not quite the same as) cold cherry Jell-O! No one can save the world - until The Return of Captain Conquer!