"Mobile Suit Gundam Hathaway" is a three-part film series set in the Universal Century timeline, serving as a direct sequel to the events of "Mobile Suit Gundam: Char's Counterattack." The story takes place in UC 0105, twelve years after the Second Neo Zeon War, and centers on Hathaway Noa, the son of Bright Noa, a prominent figure in the Earth Federation. Hathaway, now a disillusioned young man, leads the anti-Earth Federation terrorist organization Mafty under the alias "Mafty Navue Erin." His group opposes the Federation's oppressive policies, particularly the exploitation of Earth's environment and the forced relocation of its inhabitants to space colonies.

The narrative begins with Hathaway infiltrating a Federation transport plane en route to Adelaide, Australia, where he encounters Gigi Andalucia, a mysterious and enigmatic woman with ties to the Federation. Their paths intertwine as Hathaway's mission to disrupt the Federation's plans unfolds. The Federation, meanwhile, deploys its elite unit, the Man Hunters, led by Kenneth Sleg, to track down and eliminate Mafty. Kenneth, a skilled pilot and former ally of Hathaway's father, becomes a key adversary in the conflict.

As the story progresses, Hathaway's ideals and methods are tested. His use of the advanced RX-105 Ξ Gundam, a powerful mobile suit designed to combat the Federation's forces, becomes a symbol of his rebellion. However, his actions also lead to collateral damage, raising questions about the morality of his cause. Gigi's presence complicates matters, as her motivations remain ambiguous, and her interactions with Hathaway blur the lines between ally and enemy.

The series explores themes of resistance, environmental degradation, and the cyclical nature of conflict within the Universal Century. Hathaway's internal struggle between his desire for justice and the consequences of his actions drives the narrative, culminating in a tense and morally complex confrontation with the Federation. The films maintain a focus on political intrigue, personal dilemmas, and the human cost of war, staying true to the Gundam franchise's tradition of blending mecha action with philosophical depth.