Anything I say about the story will be a spoiler, so I’ll avoid that.
The acting was good, or better than good. The script was fun, scary, and held my attention throughout. I never felt like I was watching a movie (far too common in too many clichéd Hollywood crapfests), felt like I was enjoying a story. That’s a good thing.
So, 8 of 10 from me. Won’t say more, don’t want to spoil any of the surprises. There are more than a few.