Synopsis
The story takes place in 2041 AD, when a hostile force known as the Zeravire emerges across the solar system, laying waste to every military stronghold in its path. Yet the wealthy magnate Klein Sandman, already anticipating this assault, has spent years quietly assembling a private fighting force. At the heart of his defense lies Gravion, a colossal robot fueled by gravitational energy. Meanwhile, a young man named Eiji infiltrates Sandman's fortress in hopes of locating his lost sister. Inside, he encounters another youth, Toga. Together with four other recruits, these two must pilot the super robot Gravion and stand against the Zeravire's onslaught.
