Paranormal activity? No pun intended, but one thing is for sure: this is not your run of the mill school. And when it get dark ... and traps are being manipulated (or rather broken/destroyed/shut off) ... well things happen. Things that are mostly CGI (not excellent but not too bad either - at least in my humble opinion).

That all being said, we get a lot of tropes here. And you will either go with the flow or be a bit annoyed by some of the things thrown at you. Or how characters react to things happening around them. A lot of scares and all that stuff - but not too well done. Feels like things are ... well conjured up as they go along - no pun intended. Worse movies have been made, but you don't have to watch this ... especially if you are not a fan of Korean horror movies or horror movies in general.