A young man named Akitsu Masato is captured by a secret govt. project known as "Last Guardian". He is told that his life as a normal student was all a lie, and that his real destiny is to be the pilot of a great robot called "Zeorymer of the Heavens". The truth of this is hammered in when Masato sees his parents accept payment for raising him. The Last Guardian is preparing for the resurrection of "Hau Dragon", an organization bent on world conquest. 15 years ago, Hau Dragon built 8 great robots. Each of the mecha represents a force of nature. However, before any of the robots could be used, their creater Kihara Masaki destroyed the robots except for the leader: Zeorymer. He took Zeorymer and an embryo to the government. The embryo became the boy Masato. Now, Hau Dragon has rebuilt the other 7 mecha and wants the 8th. It will be up to Masato and Himuro to pilot Zeorymer and fight against the Hau Dragon, but neither Masato or Himuro are all that they seem.
Yuratei has Dinodilus of the Earth (地のディノディロス, Chi no Dinodirasu) and Burstone of the Mountains (山のバーストン, Yama no Bāsuton) attack Tokyo while Omzack of the Thunder (雷のオムザック, Ikazuchi no Omuzakku) wreaks havoc on the U.S. Naval fleet in the Pacific Ocean. Saiga attempts to have Rockfell and Gisou betray Tekkoryū and join him, but Zeorymer kills the trio in one fell swoop. Masaki reveals to Ooki that he secretly orchestrated all of Tekkoryū's activities and, knowing that Ooki would double-cross and kill him, he keyed his DNA into Zeorymer's computer and the embryo that would eventually grow into Masato. Following a heated mental battle, Masato regains his body. With all of her Hakkeshū wiped out, Yuratei sends Zeorymer an invitation to Tekkoryū's secret base and challenges its pilots to stop her from firing all of the world's nuclear missiles. Masato and Miku board Zeorymer for a final time and destroy the base and presumably themselves in the process. (Wikipedia, 2025)
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