The year is Universal Century 0087. Seven years have passed since the end of the One Year War. In its zeal to stamp out any remaining opposition, the Earth Federation has organized the Titans, an elite fighting force. However, the Titans soon get out of hand, committing atrocities on par with the worst the Principality of Zeon had to offer during the war. In response, dissatisified citizens, former Zeon soldiers, and even members of the Earth Federal Forces form a resistance group known as the Anti-Earth Union Group, or AEUG. As the next war is brewing, a small AEUG group arrives at Side 7 to investigate the new Gundam Mk. II