Ένα πλοίο προσάραξε σε μια μυστηριώδη ατόλη που οδηγεί σε έρευνα από τον ασφαλιστικό εκπρόσωπο Κουσανάγκι, η οποία ανακαλύπτει μια αρχαία χάντρα που δίνει στην κόρη του Ασάγκι. Εν τω μεταξύ, ο ορνιθολόγος Νάγκαμαϊν ερευνά αναφορές για ένα νέο είδος μεγάλου πουλιού που ονομάζεται Γκάιος. Καθώς οι Γκάιος αρχίζουν να επιτίθενται, εμφανίζεται ένας αρχαίος φύλακας με δεσμό με την Ασάγκι.
A nuclear explosion in the far north unleashes Gamera, the legendary flying turtle, from his sleep under the ice. In his search for energy, Gamera wreaks havoc over the entire world, and it's up to the scientists, assisted by a young boy with a strange sympathic link to the monster, to put a stop to Gamera's rampage.
A strange meteor lands in Japan and unleashes hundreds of insect-like "Legion" creatures bent on colonizing the Earth. When the military fails to control the situation, Gamera shows up to deal with the ever-evolving space adversary. However the battle may result in Gamera losing his bond with both Asagi and humanity.
When a giant stone statue on Wester Island is disturbed, the legendary monster Jiger appears and heads for Japan. Gamera tries to stop this new rival, only to be injured when Jiger lays eggs inside of him. As two boys in a submarine go on a dangerous quest inside of Gamera's body to save him, Jiger threatens the Expo '70 world's fair in Osaka.
Το 1973 ο Gamera θυσιάζεται για να απαλλάξει την ανθρωπότητα απ'τα αρπακτικά πουλιά Gyaos μια για πάντα. Τριάντα χρόνια αργότερα, ένα μικρό αγόρι ο Τόρου του οποίου ο πατέρας είδε τον Gamera να θυσιάζεται το '73, βρίσκει ένα μυστηριώδες αυγό. Από αυτό βγαίνει μια μικρή χελώνα. Ο Τόρου και οι φίλοι του καθώς μεγαλώνουν την Χελώνα ανακαλύπτουν ότι είναι ένα μικρό Gamera. Αφού ένα ανθρωποφάγο γιγάντιο τέρας κάνει την εμφάνισή του, είναι στο χέρι του μικρού Gamera να σώσει τον κόσμο, όπως και ο προηγούμενος Gamera είχε κάνει.
With the Gyaos re-emerging, Gamera's ties to humanity have been severed with his bond to Asagi broken. Nagamine and Asagi investigate while an orphaned girl named Ayana discovers a new creature she names Iris. Nagamine and Asagi must reach Ayana before she takes her revenge on Gamera, who she blames for the death of her family.
As a massive alien craft heads to Earth to do evil, three good and powerful superwomen befriend a young boy who has a special connection to Gamera. The alien Zanon launches a battery of familiar foes against Gamera, who might have to give the ultimate sacrifice to defeat the alien invader.
Two young boys sneak aboard a spaceship and find themselves whisked away to the mysterious planet Terra. There, they encounter Gamera's old foe Gyaos and two female aliens with a taste for human brains. Gamera must save the children and battle the new monster Guiron, whose entire body is a deadly living weapon.
Unusual volcanic activity in Japan awakens Gyaos, a bloodthirsty flying monster with the power to slice things in half with an ultrasonic ray. While scientists and the military scramble to devise a way to stop this new threat, a young boy forms an alliance with Gamera; a monster no one else seems to trust.
As alien invaders plot to conquer the Earth, two Boy Scouts steal a mini-submarine and discover Gamera in their midst. Transported to the alien's spaceship, the Scouts are menaced by the evil inhabitants, including Viras, a squid-like monster that grows to colossal size to battle Gamera.
Gamera escapes from his rocket enclosure and makes his way back to Earth as a giant opal from New Guinea is brought back to Japan. The opal is discovered to have been an egg that births a new monster called Barugon. The creature attacks the city of Osaka by emitting a destructive rainbow ray from his back, along with a freezing spray capable of incapacitating Gamera.
A moon base is destroyed by a spaceship from Zigra which is looking to take over the planet earth to use its oceans for its ocean-dwelling denizens. Gamera must once again come to the aid of the human race while all of Japan roots him on.
An atomic explosion awakens Gammera, a giant fire breathing turtle monster from his millions of years of hibernation.
As two Earth boys plead for Gamera to rescue them from a planet of cannibals, Crow experiences a wonderful dream in which he turns the tables on the Mads.