The "Mobile Suit Gundam - The Movie Trilogy" condenses the original 1979 "Mobile Suit Gundam" television series into three films, retelling the story of the One Year War between the Earth Federation and the Principality of Zeon. The narrative begins with the outbreak of war, as Zeon, a space colony seeking independence, declares war on the Earth Federation. The conflict escalates when Zeon deploys mobile suits, advanced humanoid weapons, gaining a significant military advantage. The Earth Federation, initially unprepared, develops its own mobile suit, the RX-78-2 Gundam, to counter Zeon's forces.

The story centers on Amuro Ray, a young civilian living in the space colony Side 7, who becomes the pilot of the Gundam after Zeon forces attack the colony. Amuro, along with other survivors, including the crew of the Federation warship White Base, is thrust into the war. The White Base, carrying the Gundam and other mobile suits, becomes a key target for Zeon as it travels to Earth and later into space, engaging in numerous battles. Amuro's growth as a pilot and his struggle with the psychological toll of war are central themes, as he grapples with his responsibilities and the increasing pressure of combat.

Char Aznable, a skilled Zeon pilot and antagonist, plays a pivotal role in the story. Char, also known as the "Red Comet," is driven by personal motives, including a vendetta against the Zabi family, the rulers of Zeon. His rivalry with Amuro becomes a recurring element, as their encounters grow more intense and personal. The Zabi family, led by Degwin Zabi, oversees Zeon's war efforts, but internal conflicts and power struggles within the family contribute to the faction's instability.

As the war progresses, the White Base crew faces numerous challenges, including resource shortages, internal conflicts, and the constant threat of Zeon's forces. Key battles, such as the defense of Jaburo (the Federation's headquarters) and the assault on Solomon (a Zeon stronghold), highlight the escalating stakes. The narrative also explores the broader consequences of war, including the suffering of civilians and the moral dilemmas faced by soldiers on both sides.

The final act of the trilogy focuses on the climactic Battle of A Baoa Qu, a decisive confrontation between the Federation and Zeon. Amuro and Char engage in a personal duel, symbolizing the culmination of their rivalry. The battle results in significant losses for both sides, including the deaths of key figures such as Gihren Zabi and Degwin Zabi. The war ends with Zeon's defeat, but the trilogy leaves room for reflection on the cost of conflict and the uncertain future of humanity.

The "Mobile Suit Gundam - The Movie Trilogy" retains the core themes and character arcs of the original series while streamlining the narrative for a cinematic format. It remains a foundational work in the Gundam franchise, introducing iconic characters, mecha designs, and themes that have influenced the genre for decades.