Follows the heroic efforts of the crypto-zoological agency Monarch as its members face off against a battery of god-sized monsters, including the mighty Godzilla, who collides with Mothra, Rodan, and his ultimate nemesis, the three-headed King Ghidorah. When these ancient super-species, thought to be mere myths, rise again, they all vie for supremacy, leaving humanity's very existence hanging in the balance.

At the turn of the century, all of the Earth's monsters have been rounded up and kept safely on Monsterland. Chaos erupts when a race of she-aliens known as the Kilaaks unleash the monsters across the world.

After being caught in a storm in the south seas, several teenagers and thief arrive on an island where natives have been enslaved by a terrorist organization. They also discover a sleeping Godzilla and decide to wake him up to aid in their plan to free the natives.

A new Mothra takes to the air and must battle Death Ghidora to save humanity.

Mothra's twin nymphs and children from the city find a lost city, as well as a giant monster that is attracted to environmental calamities.

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