In the summer of 1989, four kids in Tokyo witness the emergence of the turtle kaiju Gamera, who bravely stands up against giant human-eating monsters.

With the earth alliance weakened, Haruo weighs siding with the Exif, whose death cult is summoning a monster that can destroy the world.

On Earth, Haruo and his companions make contact with the indigenous Houtua tribe. To defeat Godzilla, they set out for the old Mechagodzilla facility.

Inside a vast, self-replicating city bent on eliminating all life, mysterious loner Killy emerges to guide a remnant of humanity desperate to survive.

A teenager discovers that he is an Ajin and flees before the authorities experiment on him. Other Ajin plan to fight back and he must choose a side.