Mothra's dark counterpart, Battra, emerges to eliminate humanity on behalf of the Earth. Two tiny fairies called the Cosmos offer their help by calling Mothra to battle the creature. Unfortunately a meteorite has awoken a hibernating Godzilla as a three way battle for the Earth begins.
After the previous Godzilla attack, a miniature arms race ensues to collect his cells. Concerned over Godzilla's possible return, the Japanese government uses the cells to create a new bio-weapon, ANEB (Anti-Nuclear Energy Bacteria). They seeks the aid of geneticist Genshiro Shiragami, who's experiments result in a new mutation.
Benio, a peppy tomboy, is surprised to learn that she has been secretly betrothed by her grandfather to a young officer named Shinobu Ijuin. Because of his family’s noble status, Benio must first undergo rigorous training to learn how to be a proper bride and wife before she can marry. However, because of her vivacious personality, this proves to me more challenging than anyone imagined.
Oichi may have met her match as she vies against the evil beauty that has set her sights on destroying her. She must face numerous other challenges before confronting her greatest rival. While longing to live and love like other women, she realizes that she can never have a normal life, her sword which she holds on to like a security blanket will always come between her and such a life...
