Belvera succeeds, but is thwarted by her sisters' pet, Fairy, and fails to retrieve the proper unit for her dagger while Moll and Lora end up with one for the former.

The next day, preteen Shota ditches school to investigate a meteor that recently landed in Aoki Forest, while children from across the city mysteriously vanish.

Upon examining the meteor's remains, Moll and Lora deduce King Ghidorah, a three-headed space dragon who had invaded Earth and killed the dinosaurs, has returned to capture the children and placed them in an organic dome to feed upon.

Afterward, Moll gives Shota her dagger and asks him to enter the dome to find Lora and convince her to help Mothra battle Ghidorah.

At Shota's urging, Lora sends her powers to Mothra, allowing her to immobilize Ghidorah, defeating him by dropping him in a volcano, but unaware a severed piece of the dragon's tail burrowed underground.

Afterward, she evolves into Eternal Mothra and tells Belvera and Lora to channel their powers through their sword to revive Moll.

As the children are released once more and reunite with their parents, Shota and his family watch as Moll, Lora, Fairy, and Mothra fly off into the sunset.