While a series of strange earthquakes are going on, Hongo is contacted by his childhood friend and seismologist, Amemiya Chikako, who tells him, “Something is planning to cause a major earthquake.”

Hongo begins an investigation into the series of incidents where people who had glasses made at Kagemura's Optometry store have gone missing. But even Ruriko gets some lure glasses, and she disappears as well.

Doctor Shirakawa has invented a death ray but tries to seal his invention away, while his aid Shibata conspires with Shocker and is remodeled into the monster Geckogeras, making secret plans to take the death ray.

Shocker creates a missile base in the mountains and appoints the monster Hitodanger to defend it. After saving a boy from a Shocker attack, he fights Hitodanger to save Taki who went searching for the base.

After a prisoner is immersed in the extract of poisonous mushrooms for one week, the monster Kinokomorgue is born.

Kinokomorgue declares, “Make him taste the fear of death!” and injects the captured Ichimonji with the antidote, returning him to his senses.

Shocker schemes to turn Tokyo Bay into a sea of flames by pouring in petroleum from industrial areas, equipping the monster Mogurang with an Electro Eye that he uses to capture humans.

Shocker seeks humans capable of withstanding 5000 volts of electricity to make a resource of Electric Humans they can use to assassinate important figures, so Kuragedal who can release high-voltage currents is sent to capture people.

Doctor Shimura's research that can revive ancient lifeforms catches the eye of Shocker, who steal the ancient trilobite ressurected from a fossil and infuse it with the blood of a blood-sucking cyborg, creating the monster Zanbronzo.

The monster Dokudahlian is made from a man-eating flower that's lived for 200 years in the deep forests of New Guinea and he transforms into a florist who emits hypnosis sound waves.

Doctor Origuchi of the Criminal Research Institute looks into Shocker's evil doing, and discovers their plan to split the Japanese islands with a special nuclear weapon.

The monster Moldbinga schemes to cultivate a killer mold that grows from the nourishment of humans and he attacks people in the graveyard near the hideout so he can conduct tests with his killer mold.

Shocker develops a bacteria that ages biological cells. By putting the bacteria into the balls of a bowling alley, they conduct an experiment to rapidly age young people.

The Shocker monster Gireera schemes to throw capsules packed with a deadly poison powder into Japan's national reservoirs for their “Poison Water Strategy”.

Hongo's friend Sawada completes a liquid gunpowder that can melt any metal. The Shocker monster Poisonmondo targets this gunpowder.

The Owl Man begins experimenting with the Murder X-Rays equipped in both of his eyes that can turn living things into bone.

The Boys Rider Squad come to hike Mount Oomuro. Meanwhile, Gel-Shocker's Eaglemantis executes the human hunting strategy and attacks a bus headed for Mount Oomuro, abducting the passengers.

Kazami Shiro rushes to Tatsunoko Point where Destron has been sinking passing ships, in a bid to seize control of the seas. After encountering Blowfish-Apache's torpedoes, Shiro discovers slaves working in a secret weapons factory. With the help of Tachibana Tobei, Shiro is able to penetrate the Destron outpost, but they are led into a deadly trap, and sunk to the bottom of the sea! Can V3 save Tachibana and stop Destron?

In order to wage germ warfare on Japan, Destron takes over the Osato Biological Institute and tortures the head scientist, to pillage his research. Meanwhile Rider Scout Yoshio notices that young women go into the institute but don't come out. So he snoops around to check things out, but is captured by Cockroach-Spike. Junko goes in to rescue him posing as a housekeeper, but is also caught spying. Can V3 thwart Destron's plot?

Archbishop Wing's Dryad-Flying Squirrel is able to turn a red fluid that he secretes from his claws, into a deadly gas that transforms humans into flying squirrel carcasses. His plan is to spread the gas far and wide in a violent eruption of Mt. Daisetsu. The mutant plans to use V3 to set off the explosives by kidnapping Shigeru, his cousin, and his grandfather. Will V3 trip the explosives or will he outwit Destron?