In a quest to uncover the truth behind the erased Austral Island, Tagami Yu embarks on a journey alongside his father's old friend, Dr. Waive, the doctor's daughter Doris, and the trusty Captain. En route, they face off against the ruthless international conglomerate GAIL and the criminal gang known as Cougar Connection led by Lady Lynx. Despite the perilous obstacles, they reach the mysterious island only to be threatened by a monstrous creature. As hope wanes, a colossal blue robot materializes, defeating the beast and rescuing them. This enigmatic machine, known as Giant Gorg and revered as the 'Messenger of the Gods' by the islanders, stirs a deep, familiar emotion within Yu. Evading GAIL's relentless pursuit, Gorg guides Yu into a hidden realm where ancient extraterrestrial artifacts lay dormant alongside an unearthed alien who awakens after millennia of slumber.