In a future where Earth's space colonies, known as the Next Colonies, rise up against their creators to form the Next Government, a war erupts. Advanced Metal Vehicles, or MVs, initially designed for other purposes, are repurposed for combat. Amidst this turmoil, the Terra faction, part of the Earth Rebellion, adds to the chaos. A mysterious entity resembling an MV, called S.A.C or simply 'S', emerges, sought after by Next to turn the tide of the conflict. Hal, a psychic leader of Terra, detects 'S' and becomes intrigued by its formidable abilities. Unbeknownst to all, the fate of these factions rests in the hands of a group of renegades dwelling on the deserted Next 7 colony.