Suffering, regrets, humiliation: their concentration in a single place generates curses that are often deadly... This is what Yuji Itadori, a high school student and member of the occult club, is about to discover. He doesn't believe in ghosts, but he is endowed with extraordinary physical strength that is a true asset for the group's missions... until one of them takes a turn for the worse.

The relic they uncover—the severed finger of a thousand-year-old demon—attracts monsters! Without thinking, the young man swallows the relic to break the curse! Now, he finds himself possessed by Ryomen Sukuna, the famous double-faced demon. However, against all odds, Yuji is still able to maintain control over his body. Despite this, he is sentenced to death by the jujutsu sorcerers' organization... a decision that can only be postponed on one condition: find all of Sukuna's fingers to eliminate the threat once and for all!