To save the world, Mothra goes back in time in an attempt to defeat a younger King Ghidorah.

The fairies from Infant Island discover a lost city, as well as a giant monster that is attracted to environmental calamities.

A new Mothra takes to the air and battles against Desghidorah to save all of humanity.

Shipwreck survivors found on the presumably uninhabited Infant Island leads to a scientific expedition that discovers a surviving native population along with the Shobijin, tiny twin fairy priestesses of the island's mythical deity called Mothra. After the fairies are kidnapped by an exploitative businessman named Clark Nelson, Mothra sets out to rescue them.