Tomoru, a teenage boy in the 24th century, escapes this dreary life through the use of a dream manipulator. During one of these sessions he finds himself interrupted by several menacing shapes, before he can be destroyed though, another being, like the others, rescues him and calls out his name. He soon discovers he is telepathically linked to the mysterious mecha Orgun. Meanwhile, at the Earth Defense Force Intelligence Headquarters, Dr. Michi Kanzaki and the supercomputer, I-Zak, decrypt a message from deep space that turns out to be the blueprint for Orgun's physical being. Orgun is a dissident of the Evoluders, a super race of cybernetic beings that are programmed to conquer and destroy all the planets in their way. And next on their list is Earth. As they make these discoveries the Evoluders near the Earth with plans to destroy it. Can the combination of Tomoru, Kanzaki, and Orgun defeat them?