The Universal Century, a history marked by space colonization and space warfare, has passed. Humanity's prosperity has ushered in a new era of global peace known as the Regild Century. Bellri Zenam, a pilot training with the Capital Guard, is chosen by the G-Self-a highly maneuverable Mobile Suit of unknown origin, operable only by a select few—to embark on a journey that will change the course of the Regild Century forever.