"Last Exile" is set in the fictional world of Prester, a land where nations are locked in perpetual aerial warfare. The story revolves around Claus Valca and Lavie Head, two young vanship pilots who deliver messages and cargo across the skies. Their lives take a dramatic turn when they accept a dangerous mission to deliver a mysterious girl named Alvis Hamilton to the legendary battleship Silvana. This decision thrusts them into the heart of a conflict between the powerful nations of Anatoray and Disith, both vying for dominance in the skies.

The Silvana, commanded by the enigmatic Captain Alex Row, is a rogue ship operating independently of both nations. Alex harbors a personal vendetta against the Guild, a technologically advanced organization that oversees the war and enforces its rules with absolute authority. The Guild’s control over the skies is maintained through their monopoly on advanced technology, including the powerful Claudia units that power airships and vanships. Alvis, the girl Claus and Lavie are tasked with protecting, is revealed to be a key figure in the Guild’s plans, possessing a unique ability tied to the ancient Exile, a mythical ship said to hold the power to change the world.

As the story progresses, Claus and Lavie become entangled in the larger conflict, forming alliances with the crew of the Silvana, including the skilled navigator Tatiana Wisla and the stoic mechanic Mullin Shetland. The narrative explores themes of loyalty, sacrifice, and the cost of war, as the characters navigate shifting allegiances and uncover the truth about the Guild’s motives. The Guild’s leader, Maestro Delphine, seeks to harness the power of the Exile to maintain control over Prester, while Alex and his allies aim to dismantle the Guild’s oppressive regime.

The climax of the series centers on the race to locate the Exile, with both the Silvana and the Guild pursuing it. The discovery of the Exile reveals its true nature as a relic of an ancient civilization, capable of reshaping the world. The resolution of the conflict hinges on the choices made by Claus, Lavie, and their allies, as they confront the moral complexities of war and the consequences of wielding immense power. The story concludes with a reconfiguration of Prester’s political landscape, as the characters strive to build a future free from the cycle of violence and oppression.