In Metropia, a gigantic city in an alternate future as seen from 1939, private eye Raymond Gunn is drawn into a case involving aliens, murder and a multimedia star named Venus Nova.
In Japan, scientifically advanced invaders from the war-destroyed planet Mysteroid cause an entire village to vanish, then send a giant robot out to storm the city by night, after which they request a small patch of land on Earth and the right to marry earthling women, claiming to be pacifists. Mankind must decide whether to capitulate or to resist.
When meteors in a curious V-formation crash on a Cornwall field, an alien force possesses several scientists and infects bystanders with a deadly disease. Shielded from the meteor's influence by a metal plate in his head, Dr Curtis Temple discovers that an alien race on the moon seeks to use the manipulated geniuses for seemingly nefarious purposes. But, as he learns more about the invaders, they may not be as evil as initially thought.
In England, an eccentric police inspector, an earnest test pilot and a spunky female reporter team up to solve the mystery of a series of test aircraft which have disappeared without a trace while over the ocean on their maiden flights; unaware, as they are, that a spy ring has been shooting the planes down with a ray machine hidden aboard a salvage vessel which is on hand to haul the downed aircraft aboard, crews and all.
After procuring a special ray gun, a precocious orphan helps his community by exposing the shady doings of local government, and plays a part in a cute couple getting together.
A preteen prodigy is offered a scholarship to a graduate research program when she learns that her guardian grandfather has fallen into debt with nefarious mobsters.