I didn't watch this when it originally aired because I didn't think I would enjoy it. It's not my usual genre, and the plot didn't interest me that much. I've branched out quite a bit since it's release and then I enjoyed Seo Ye Ji so much in It's Okay to Not Be Okay that I decided to try this on a whim. And then I accidentally got my husband sucked into it as well.
This show is intense. We were both riding an anxiety rollercoaster while watching this show and practically biting our nails wanting to rescue Sang Mi ourselves. LOL!

The acting from most of the main cast was really good. Seo Ye Ji is a master at acting. Her micro-expressions are on point, and she carries this fierceness about her that is just intoxicating. Ok Taecyeon was decent, but as the main lead (Han Sang Hwan), I though he could have done better. Woo Do Hwan is another star on the rise. He's been amazing in everything I've watched him in so far, including this. Jo Jae Yoon was terrifying as Jo Wan Tae and Jo Sung Ha as the 'pastor' was not only terrifying but did crazed zealot very well also.

I think the most terrifying thing about this show was that this sort of thing can and does happen to people. To watch the cult leaders twist the Bible and use it to control, abuse, and extort from their congregants twisted my insides. To see that Sang Mi had no escape and no voice - that even her own parents who loved her were brainwashed and useless to her worked me up.
I'm glad I watched it in the end. It was very well-done and a much better drama than I was expecting. The ending was mostly satisfying, but will still give you a chill. I don't think I'd watch it again, but just because that sort of genre doesn't watch the same way after knowing the outcome. If you have trauma triggers, I'd probably avoid it, but if you enjoy dark and intense shows, this should be on your list!