The Elias sisters, Moll and Lora, attempt to stop their vengeful sister, Belvera, from stealing the Elias triangle, three power units that can transform the sisters' daggers into powerful swords. Belvera succeeds, but is thwarted by her sisters' pet, Fairy Mothra, 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 while children from across the city mysteriously vanish. Upon examining the meteor's remains, the Elias deduce that King Ghidorah, a three-headed space dragon who previously visited Earth and killed the dinosaurs, has returned to capture the children and placed them in an organic dome. The pair summon their ally, Mothra, to fight King Ghidorah, but the dragon overpowers her and hypnotizes Lora, forcing her to attack Moll before attempting to drag them both into the dome until the Elias' pet, Fairy Mothra, rescues Moll. Intrigued by King Ghidorah's arrival, Belvera investigates, but gets dragged into the dome.

While regrouping with Mothra, Moll encounters Shota, who learned his siblings Shuehei and Tamako were captured as well, and tells him about Ghidorah's plan to feed on the children's life force. Using all of her power, Moll helps Mothra transform into Light Speed Mothra and travel back in time to confront a younger King Ghidorah. Following this, Moll gives Shota her sword and asks him to enter the dome to find Lora and convince her to help Mothra. After she reluctantly agrees, a powerless Moll falls into a state of suspended animation. Meanwhile, Belvera encounters Lora and tells her that King Ghidorah plans to destroy Earth. Still under King Ghidorah's spell, Lora takes Belvera's unit, transforms her dagger, and engages her sister in combat. Belvera begs Lora to see reason and work with her, but to no avail. Shota soon finds them and helps free Lora of King Ghidorah's brainwashing. As she collapses, her sword combines with Moll's. Realizing that the Elias triangle represents her and her sisters, Belvera uses the last unit to transform her dagger and combine her sword with Moll and Lora's in an attempt to break the dome. As it shakes violently, Shota realizes Mothra is losing and asks Lora to help her. Lora sends her powers to Mothra, allowing her to immobilize Ghidorah and drop him in a volcano, unaware that a severed piece of the dragon's tail burrows underground. Grievously injured during the fight, Mothra crashes to the ground and dies. However, three Mothra larvae of an ancient species appear and encase Mothra in a silk cocoon, allowing her to rest and recover from her injuries.

In the present, King Ghidorah and the dome disappear entirely, freeing the captives. Shota reunites with his siblings and join Belvera and Lora as they stand vigil over Moll. Suddenly, King Ghidorah, having regenerated from the severed tail, emerges and recaptures the children. Belvera and Lora join forces to fight King Ghidorah until Mothra emerges from her cocoon as Armor Mothra. Using her new powers, she disintegrates King Ghidorah before telling the Elias to channel their powers through their sword to revive Moll. Sure enough, the pair succeed, though Belvera leaves shortly after. As the children are released once more and reunite with their parents, Shota's family watch as the Elias, Fairy, and Mothra, now Eternal Mothra, fly off into the sunset for home.

• Megumi Kobayashi as Moll
• Misato Tate as Lora
• Aki Hano as Belvera
• Atsushi Ohnita as Father
• Miyuki Matsuda as Mother
• Kôichi Ueda as Kôchô

Home media edit

The film was released on Blu-ray by Sony, as part of the Toho Godzilla Collection, with all 3 Rebirth of Mothra films in September 2014.^[1]

• Rebirth of Mothra III at IMDb  
• "モスラ3 キングギドラ来襲 (Mosura Surī Kingugidorah Raishū)" (in Japanese). Japanese Movie Database. Retrieved 2007-07-19.