The story follows high school student Itadori Yuji as he joins a secret organization of sorcerers to kill a powerful curse named Ryomen Sukuna, of which Yuji becomes the container. A high-level Curse, considered the "King of Curses" due to his anger and power. According to legend, Sukuna was a humanoid four-armed demon that appeared during the Age of Magic. The magicians of his time were unable to resist him, so they could only seal his fingers, hoping that one day they would be destroyed. He now lives in the body of Itadori Yuji and plans to regain his power and body. His influence is such that all other curses try to help Gojo and the others.