"Hamatora" is a manga series set in a world where certain individuals, known as Minimum Holders, possess unique supernatural abilities called "Minimum." The story primarily revolves around the Hamatora detective agency, a small group of Minimum Holders based in Yokohama. The agency is run by Nice and Murasaki, two close friends who use their abilities to solve cases and assist clients. Nice, the leader, has the power to manipulate sound, while Murasaki, his partner, possesses superhuman strength. Together, they take on various jobs, often involving other Minimum Holders or individuals connected to the mysterious phenomenon.

The narrative begins with the duo investigating a series of murders targeting Minimum Holders. As they delve deeper, they uncover a larger conspiracy involving a secret organization known as "Facultas," which conducts unethical experiments to artificially create Minimum Holders. These experiments often result in unstable or dangerous individuals, leading to widespread chaos. The story explores themes of identity, morality, and the ethical implications of power, as the characters grapple with their own abilities and the consequences of their actions.

Key characters include Hajime, a cheerful and enigmatic girl with a Minimum ability related to probability, and Art, a former police officer who becomes an ally to the Hamatora team. The antagonist, Moral, is a complex figure who believes in creating a world where only the "worthy" possess Minimum abilities, leading to a direct conflict with Nice and his team. The series also introduces a rival detective agency, Ratio, led by Birthday, a flamboyant and unpredictable Minimum Holder with a grudge against Nice.

As the story progresses, the Hamatora team faces escalating threats, including the emergence of "Faceless," individuals who have lost their identities due to failed Minimum experiments. The narrative builds toward a climactic confrontation between Nice and Moral, culminating in a battle that challenges the very nature of Minimum abilities and their impact on society. The series balances action, mystery, and character-driven drama, offering a layered exploration of its central themes while maintaining a fast-paced and engaging plot.