"Mobile Suit Gundam AGE Memory of Eden" is a retelling of the second-generation arc from the original "Mobile Suit Gundam AGE" series, focusing on Asemu Asuno and his struggles as a mobile suit pilot. The story is set in the Advanced Generation era, where humanity faces a prolonged war against the mysterious alien race known as the Vagans. Asemu, the son of Flit Asuno, the original Gundam pilot, inherits the AGE system and the Gundam AGE-2 to protect Earth and its colonies.

The narrative begins with Asemu enrolling in the Earth Federation's military academy, where he trains to become a pilot. His journey is marked by his rivalry with Zeheart Galette, a Vagan infiltrator posing as a fellow cadet. Despite their opposing loyalties, the two form a complex bond, blending friendship and enmity. Asemu's growth as a pilot is central to the story, as he grapples with his father's legacy and his own identity. The AGE system, which evolves the Gundam based on combat data, plays a crucial role in his development, allowing him to adapt to increasingly powerful Vagan threats.

The conflict intensifies as the Vagans launch a full-scale assault on Earth, forcing Asemu to confront the harsh realities of war. His relationship with Zeheart becomes increasingly strained as their paths diverge, culminating in a climactic battle that tests their ideals and resolve. The story also explores themes of generational conflict, as Asemu struggles to reconcile his father's rigid beliefs with his own desire for understanding and peace.

Key characters include Asemu Asuno, a determined yet conflicted pilot; Zeheart Galette, a Vagan operative torn between duty and personal connections; and Romary Stone, Asemu's love interest, who provides emotional support and a civilian perspective on the war. The narrative emphasizes the personal and ideological struggles of its characters, set against the backdrop of a larger interstellar conflict. "Memory of Eden" condenses and refines the original arc, offering a more focused exploration of Asemu's journey and his pivotal role in the war against the Vagans.