"Mobile Suit Gundam Twilight AXIS" is a manga series set in the Universal Century timeline of the Gundam franchise, taking place after the events of "Mobile Suit Gundam: Char's Counterattack." The story revolves around two former Zeon engineers, Arlette Almage and Danton Hyleg, who are recruited by the Earth Federation to investigate the remnants of the Axis asteroid, a key location in the previous war. Their mission is to uncover hidden technology and secrets left behind by the Principality of Zeon.

Arlette and Danton have personal ties to the conflict, having worked on advanced mobile suit development during the war. Arlette, in particular, has a mysterious connection to the enigmatic Char Aznable, whose legacy looms large over the narrative. As they delve deeper into Axis, they encounter remnants of Zeon forces and remnants of the past, including experimental mobile suits and hidden agendas. The Earth Federation's true motives for the mission come into question, as do the loyalties of the characters involved.

The story explores themes of memory, identity, and the lingering scars of war, as Arlette and Danton confront their pasts and the consequences of their actions. The narrative is driven by a mix of political intrigue, personal drama, and intense mobile suit battles, as the characters navigate the shifting alliances and moral ambiguities of the post-war landscape. The manga provides a compact yet layered addition to the Gundam universe, focusing on the human cost of conflict and the enduring impact of historical events.