Lin Shen accidentally transmigrates into the world of Jujutsu Kaisen while staying up late watching anime. He saves Yuji during Satoru Gojo’s battle with a Special Grade Cursed Spirit, earning Gojo’s recognition and a place at Jujutsu High. Thanks to his familiarity with the story, he plays a key role in a mission involving a cursed spirit at an abandoned hospital, winning his companions’ respect.
During an exchange between the two schools, research into an ancient, mysterious jujutsu text sparks a standoff between Tokyo Jujutsu High and Kyoto Jujutsu High. Lin Shen shares his research findings to ease tensions for the moment, but that night he discovers a secret hidden in the text: “The forbidden key must be drawn with blood.” Late at night, a black-clad cursed spirit attacks to steal the text. Lin Shen comes across Nobara fighting the spirit and also discovers that something is wrong with Mechamaru.
In the library, Maki Zenin confronts Mechamaru, whose programming has been altered, while Satoru Gojo is trapped. Lin Shen activates the text’s hidden power with his blood, helping Gojo escape and exposing the truth that the Zenin clan has been using Maki. With the crisis over, Lin Shen holds the text, which contains the power to break the jujutsu hierarchy, and begins a whole new adventure in the world of jujutsu.
