在这部摩斯拉决战哥斯拉动作/剧情/恐怖片中,A hurricane blows Mothra's egg off Infant Island and causes it to drift to Japan. Banzo Torhata sees an opportunity to make money off the egg but Mothra's twin priestesses show up and plead with him to return the egg or else the larva will hatch and cause great damage in search of food. Torahata refuses and tries to kidnap the fairies. They then go to reporters Ichiro Sakai and Junko Nakanishi to try to persuade Torahata to return the egg. Torahata still refuses and the girls leave with the adult Mothra. In the meantime Godzilla reawakens and begins another rampage. Japan's only hope is for Mothra to return and not only save her unhatched offspring, but Japan as well.
A greedy developer has placed huge machines to suck dry a part of the ocean near Tokyo so he can put luxury condos there. After a storm, a giant egg washes up on the beach nearby and is immediately put on public display. The developer's plans go awry when he disrupts Godzilla's rest and the monster goes stomping through Tokyo again. It's up to the elderly Mothra, and then to its two offspring, to save Tokyo from destruction.
