A long-standing battle hides in plain sight. Curses, supernatural monsters, terrorize humanity from the shadows, while powerful humans called Jujutsu sorcerers employ mystical arts to eliminate them. After high school student Yuuji Itadori discovers a dried finger belonging to the legendary Curse Sukuna Ryoumen, he is thrust into this violent conflict.
When a Curse drawn by the finger's power attacks him, Yuuji makes a rash choice to defend himself, gaining the ability to fight Curses but also inadvertently releasing the malevolent Sukuna back into the world. Although Yuuji can contain and control Sukuna within his body, the Jujutsu society considers him a dangerous, high-level Curse that must be destroyed.
Captured and condemned to death, Yuuji encounters Satoru Gojou, a teacher at Jujutsu High School, who tells him that despite his impending execution, there is another option. As a rare vessel for Sukuna, if Yuuji dies, Sukuna would also perish. So, if Yuuji consumes the remaining fragments of Sukuna, then his later execution would completely eliminate the evil demon. Seizing this chance to make the world safer and extend his own life, Yuuji enrolls at Tokyo Prefectural Jujutsu High School, leaping into a brutal and merciless battlefield.