"The Severing Crime Edge" is a supernatural mystery anime centered around the concept of cursed hair and the individuals connected to it. The narrative revolves around Kiri Haimura, a high school student with an unusual obsession: he is fascinated by cutting hair, particularly that of girls. His life takes a dramatic turn when he encounters Iwai Mushanokouji, a girl with extraordinarily long, cursed hair known as the "Hair Queen." Iwai’s hair cannot be cut by ordinary means, as it is said to bring misfortune to anyone who attempts to sever it. However, Kiri discovers that he possesses a pair of special scissors, the "Killing Goods," which are capable of cutting her hair without causing harm.

As the story progresses, it is revealed that Iwai is not the only one affected by such curses. Other individuals, known as "Killing Owners," possess cursed objects with unique abilities, and they are drawn into a deadly game orchestrated by a mysterious figure called the "Game Master." The Game Master forces these individuals to confront one another in battles where the stakes are life and death. Kiri and Iwai become entangled in this dangerous world, forming a bond as they seek to uncover the truth behind the curses and the Game Master’s motives.

The series explores themes of fate, identity, and the consequences of wielding supernatural power. Kiri’s determination to protect Iwai and his growing feelings for her drive much of the narrative, while Iwai struggles with the burden of her curse and the fear of bringing harm to others. Supporting characters, such as the enigmatic detective Hajiki and other Killing Owners, add depth to the story, each with their own motivations and connections to the overarching mystery.

The plot unfolds through a mix of episodic encounters with other cursed individuals and a larger, interconnected mystery surrounding the origins of the Killing Goods and the Game Master’s true intentions. The series balances moments of tension and action with quieter, emotional scenes that delve into the characters’ personal struggles. By the end, the narrative leaves several questions unanswered, emphasizing the ongoing nature of the characters’ journey and the unresolved mysteries of their world.