In the aftermath of Char Aznable's failed space migration plan, the year Universal Century 0096 finds colonies like Side 4 bustling with life. Among the residents is Banagher Links, a 16-year-old leading a peaceful existence with his peers. Audrey Burne, the sole descendant of a once-powerful lineage, sets out to acquire 'Laplace's Box,' a mysterious artifact believed to hold immense universal influence. Her quest brings her to Side 4, where she crosses paths with Banagher, altering his destiny irrevocably. As the Sleeves, remnants of Char Aznable's Neo-Zeon, target Side 4, Banagher seizes control of the Gundam Unicorn to defend his comrades and safeguard humanity's future against formidable foes like Marida Cruz and Full Frontal.