Another planet is speeding toward the earth threatening to destroy it in a collision. The only people who can save the earth are some poorly dubbed Italian scientists.
Giant bug aliens from a dying planet in “Space Hunter Nebula-M” plot assume the bodies of dead humans and work as the development staff of the peace-themed theme park, World Children’s Land, the centerpiece of which is “Godzilla Tower”. Then they plan to use Gigan and King Ghirorah to wipe out all earthlings.
An experimental satellite-based weapon that fires miniature black holes, called the Dimension Tide, opens a wormhole through which a giant prehistoric dragonfly enters the present and deposits a single egg before exiting through the wormhole. A boy finds the egg and takes it with him when he moves to Tokyo. The egg starts oozing a strange liquid, so the boy throws the egg in the sewer. The egg, actually a mass of hundreds of eggs, splits up and starts growing when exposed to water, hatching into giant dragonfly larva called Meganulon that come out of the sewer to feed. They flood a portion of the city and moult on the sides of buildings, becoming adult Meganula.
This is a fairy tale, mixed with Kung Fu, romance, serious subjects and a little slapstick comedy that usually looks like a training session at the Bejing Circus school. It’s not oversexed, overly violent, or gory. It’s fun.