"Theory of Monopoly" is a manga series that explores themes of power, control, and human ambition within a dystopian framework. The narrative is set in a near-future society where economic disparity has reached extreme levels, and a single corporation, Monopoly Inc., dominates all aspects of life. The corporation enforces its rule through a combination of advanced technology, surveillance, and psychological manipulation, creating a rigid class system where the elite enjoy unparalleled luxury while the majority struggle in poverty.

The protagonist, Kaito Arata, is a former engineer who once worked for Monopoly Inc. but became disillusioned with its oppressive practices. After witnessing the corporation's exploitation of the lower classes, Kaito joins a resistance group known as the Liberators. The group aims to dismantle Monopoly Inc.'s control and restore equality to society. Kaito's technical expertise and insider knowledge make him a valuable asset to the resistance, but his past ties to the corporation also place him under constant suspicion.

The plot unfolds as Kaito and the Liberators execute a series of covert operations to undermine Monopoly Inc.'s infrastructure. These missions reveal the extent of the corporation's manipulation, including its use of AI-driven propaganda and mind-control technologies to maintain order. As the resistance gains momentum, internal conflicts arise, particularly between Kaito and the group's leader, Rina Shirogane, whose radical methods often clash with Kaito's more cautious approach.

Key characters include Rina, a fiercely determined strategist with a personal vendetta against Monopoly Inc.; Hiroshi Takeda, a former soldier who provides tactical support; and Aiko Nakamura, a hacker whose skills are crucial for infiltrating the corporation's systems. On the opposing side, the enigmatic CEO of Monopoly Inc., known only as "The Architect," serves as the primary antagonist. The Architect's motivations remain shrouded in mystery, but their actions suggest a belief in the necessity of absolute control to prevent societal collapse.

The story delves into the moral ambiguities of rebellion, questioning whether the ends justify the means and exploring the psychological toll of living under constant oppression. As the conflict escalates, Kaito is forced to confront his own ideals and the sacrifices required to achieve true change. The narrative builds toward a climactic confrontation between the Liberators and Monopoly Inc., with the fate of society hanging in the balance.