The year is R.C. 1014. The Capital Tower, an orbital elevator, connects earth and space. Due to its role in supplying Earth's power by transferring Photon Batteries from space, it is worshiped with a religious fervor. Bellri Zenam, a cadet in the Capital Guard formed to protect Capital Tower, is participating in his first non-simulated exercise when he is attacked by the powerful but unaffiliated G-Self mobile suit.