Jujutsu Kaisen, Vol. 1 introduces readers to Yuji Itadori, a typical teenager with extraordinary physical strength. He is sought after by every sports team, but he chooses to spend his time with the misfits in the Occult Research Club. When the club discovers a sealed cursed object, they inadvertently release dark forces into their world. In an effort to save his friend from a cursed spirit, Yuji swallows a piece of a powerful demon, Ryomen Sukuna. This decision thrusts him into a violent conflict with supernatural beings.

In a universe where malevolent spirits prey on humans, fragments of Sukuna's body are dangerous, as any demon that consumes them gains immense power. This power could lead to catastrophic consequences for humanity. Thankfully, a hidden school of jujutsu sorcerers protects the living from these supernatural threats. Yuji must navigate this new life, balancing his human emotions and friendships with the responsibilities that come with his newfound powers and the looming dangers of cursed spirits. The story combines action, horror, and humor as Yuji faces terrifying challenges to protect those he cares about.