"Final Fantasy Type-0" is a manga adaptation of the video game of the same name, set in the war-torn world of Orience. The narrative revolves around Class Zero, a group of fourteen elite cadets from the Vermilion Peristylium, a magical academy in the Dominion of Rubrum. These cadets are thrust into the midst of a brutal conflict known as the Militesi War, where the Militesi Empire seeks to conquer the four nations of Orience using advanced magitek technology.

The story begins with the Militesi Empire launching a surprise attack on Rubrum, deploying a powerful weapon called the Ultima Bomb to annihilate the Vermilion Peristylium. Class Zero, however, survives the attack due to their unique abilities and the intervention of their Cid Aulstyne, the headmaster of the academy. As the war escalates, Class Zero is tasked with defending Rubrum and uncovering the truth behind the conflict. Their journey takes them across Orience, where they encounter allies and enemies, including the enigmatic l'Cie, beings bound to carry out the will of the gods.

Central to the plot is the concept of Agito, a prophesied savior who will bring peace to Orience. The cadets of Class Zero are believed to be candidates for this role, though their path is fraught with sacrifice and moral ambiguity. The narrative explores themes of war, loss, and the cost of power, as the cadets grapple with their roles in the conflict and the weight of their responsibilities.

Key characters include Ace, the de facto leader of Class Zero, who wields cards as his weapon; Machina Kunagiri and Rem Tokimiya, two cadets with personal ties to the Militesi Empire; and Queen Andoria, the ruler of Rubrum, who plays a pivotal role in the war effort. The story also delves into the motivations of the Militesi Empire, particularly its emperor, and the mysterious Cid, whose true intentions remain unclear until the latter stages of the narrative.

As the war progresses, Class Zero uncovers the deeper machinations behind the conflict, including the involvement of the Rursus, a malevolent force seeking to reset the world. The cadets must confront their own mortality and the cyclical nature of war, culminating in a climactic battle that determines the fate of Orience. The manga adaptation faithfully captures the game's intricate plot and character dynamics, offering a compelling exploration of its dark and complex world.