"Jujutsu Kaisen" is a manga series set in a world where cursed energy, derived from negative emotions, manifests as dangerous supernatural entities known as curses. These curses threaten humanity, and only jujutsu sorcerers, individuals trained to harness cursed energy, can combat them. The story centers on Yuji Itadori, a high school student with exceptional physical abilities, who becomes entangled in the world of jujutsu sorcery after encountering a cursed object—a rotting finger belonging to Ryomen Sukuna, a powerful and malevolent curse from ancient times. When Yuji consumes the finger to protect his friends, he becomes Sukuna's vessel, gaining immense power but also risking the curse's eventual control over his body.

To prevent Sukuna from wreaking havoc, Yuji is taken to Tokyo Jujutsu High, a school for jujutsu sorcerers, where he trains under the guidance of Satoru Gojo, one of the strongest sorcerers in the world. Gojo believes Yuji can control Sukuna and proposes a plan to execute him after collecting all of Sukuna's fingers, which are scattered as cursed objects. Alongside his classmates, including the stoic Megumi Fushiguro and the determined Nobara Kugisaki, Yuji embarks on missions to exorcise curses and retrieve Sukuna's fingers. The narrative explores themes of morality, sacrifice, and the blurred line between good and evil as Yuji grapples with his role as Sukuna's vessel and the ethical dilemmas of jujutsu sorcery.

The series introduces a wide array of characters, including other jujutsu sorcerers, cursed spirits, and factions with conflicting agendas. Notable figures include the enigmatic Geto Suguru, a former ally of Gojo turned antagonist, and Mahito, a sadistic curse who embodies humanity's hatred and fear. The plot delves into the politics and power struggles within the jujutsu world, as well as the personal growth and challenges faced by the protagonists. As the story progresses, Yuji and his allies confront increasingly powerful curses and uncover dark secrets about the origins of cursed energy and the true nature of their enemies. The narrative balances intense action sequences with moments of introspection, creating a compelling exploration of its supernatural world and the characters who inhabit it.