In U.C. 0068, Zeon Zum Deikun, the revolutionary leader of Side 3, collapses and dies in the middle of a speech. Deikun's children Casval and Artesia are forced to flee into hiding, while the Zabi family seizes control of Side 3 and develops a new weapon to secure its independence from the Earth Federation. While we witness for the first time the untold convulsions of Universal Century history, the children now known as Char and Sayla must face destinies which will be just as tumultuous as the era itself.