In Universal Century 0087, seven years after the One Year War, the Earth Federation has established the Titans, an elite fighting force, to eradicate any remaining opposition. The Titans soon become tyrannical, committing atrocities that rival those of Zeon during the conflict. In response, dissatisfied civilians, former Zeon soldiers, and even members of the Earth Federation join forces to form the Anti‑Earth Union Group (AEUG). With another war looming, a small AEUG squad arrives at the moon colony Side 7 to investigate the newly developed Gundam Mk. II.