If you liked the first season of True Detective, I'm sure you'll enjoy this as well. The introduction is similar-it involves missing children, a bit of the deep web and darknet, and some drug-related elements. It also delivers highly satisfying plot twists. While the tension feels a bit weak at times, it picks up around the middle of the second half.
At first, it seems like a paganistic horror-thriller with mystical and detective elements, but it's not. Crime thriller would be a more accurate description.
As the story unfolds, it gradually gains momentum, and towards the end, it hits you with one twist after another, leaving you in awe. However, don't expect a happy ending-because there isn't one. First 48 is very important.
All in all, the given rating is too low; this is an underrated piece. In my opinion, it deserves at least a 7-7.5.