地球侵略を企んだ異次元侵略軍団ジャマールがビーファイターの活躍によって壊滅し、地球が平和を取り戻してから5年。新たな悪の軍団メルザード一族が2億年の眠りから覚め、絶滅した生物を怪人として甦らせ、侵略を開始した。一方アースアカデミアから発展したコスモアカデミアの日本支部では、この時を予兆していたかのように新たなインセクトアーマーを開発、装着者に選ばれた橘健吾と鮎川蘭を戦線に向かわせる。そして最強の力を誇るカブト型アーマーの装着者となったのは、メルザードの攻勢の中、勇敢にも彼らに立ち向かった高校生・鳥羽甲平だった。地球上に生きる命を守るため、今また新たな3人のビーファイターが誕生した。やがて彼らは2億年に渡る光と闇の戦い「超次元昆虫伝説」に導かれ、光の戦士たちが結集する。 <br /><br />(For Non-Japanese Viewers) <br />When you watch the video, please click the Gear icon "⚙ "in the top-right corner of the screen to access the subtitle options, then select your language if available. <br /><br />5 years have passed since the interdimensional invasion force Jamal, which plotted to conquer Earth, was destroyed by the B-Fighters, restoring peace to the planet. Now, the new evil force, the Merzard Clan, has awakened from a 200-million-year slumber. They resurrect extinct creatures as monsters and begin their invasion. Meanwhile, at the Japan branch of Cosmo Academia, evolved from Earth Academia, a new Insect Armor was developed as if foreseeing this moment. Kengo Tachibana and Ran Ayukawa, chosen as its wearers, were sent to the front lines. And the wearer of the Kabuto-type Armor, boasting the ultimate power, became Kōhei Toba, a high school student who bravely confronted them amidst Merzard's offensive. To protect all life on Earth, three new Bee Fighters were born. Soon, they would be drawn into the 200-million-year battle between light and darkness, the “Legend of the Superdimensional Insects,” where warriors of light would gather.
