Mothra has fallen after a fearsome battle with a terrifying new kaiju, ANTRA. Without its protector, the world has entered into a state of desolation. Kaiju roam freely, and what remains of humankind has been forced into hiding. Mira is a young woman living in the wasteland, who believes she lost her entire family in Mothra’s final stand. That is, until her missing twin shows up at her door with two fairies! If her sister is to be believed, Mira might hold the key to the rebirth of Mothra and the Earth’s return to normalcy. They just have to travel back in time and get its egg from the Jurassic period first.
The old Mothra may be dead, but a new Mothra has arrived! After rescuing a Mothra egg from the Cretaceous period, Mira and Emi arrived back in the present…or, actually, back at Mothra’s original fight against Antra. And worse—they brought Meganulon with them! Is it possible that their actions in the past are what led to Mothra’s original death?! Whatever the case may be, Mira and Emi now have a baby Mothra larva that they have to train to one day prevail against Antra and the monstrous Meganulon…or else this dystopian world of their own making will never be undone.