Itadori Yuuji is an average, if somewhat dim teenager, with surprising physical strength. But he's a very kind individual who would go out of his way to help someone. So when his friends are attacked by evil monsters one night, he jumps in to save them. He's seen by Fushiguro Megumi, a young exorcist who warns him that inside his school is an immensely evil relic: a finger of Sukuna. Sukuna was the most powerful and most evil man to have ever lived, and even just a finger of his body holds incredible. Unfortunately, during the following battle, Yuuji ends up swallowing the cursed finger, letting the spirit of Sukuna possess him. So now Sukuna is free to slaughter to his hearts content. Or at lest he would be, if he could actually possess Yuuji for more then a few minutes. Turns out for some reason Yuuji's soul will not allow Sukuna to take over.
One of the new power-houses in shounen manga, Jujutsu Kaisen made its name by having absolutely fantastic animation (thank you, MAPPA slaves). The story is not that great, but it kind of makes up for it by removing some of the bullshit most shounen manga have. There's no power of friendship. Explaining how your powers work to your enemy has an actual benefit, despite the risk. Also, none of that "We must fight the evil monsters 1-on-1!" crap here. It's fitting that this series is in Shounen Jump, because the monsters are getting jumped on every occasion. If there's 2 good guys and 1 bad guy, the bag guy's getting tag-teamed. In fact, I don't consider anyone an actual threat in JJK unless they got jumped once. The powers are pretty interesting. Except for, unfortunately, Yuuji. His power is hitting really hard. That's it. Yeah, a problem with this series is that the side characters are far more interesting then the main character.
A big thanks to Lupin and Shei98 for the BDMVs. Subtitles from SubsPlease.