Highly recommend watching this gripping thriller series. It's exciting from start to finish. South Korea has a real cult problem so they have a good reason to make a drama dealing with cults. With what happened in the Shincheonji Church in Daegu and the spread of Coronavirus this show is eerily relevant and prophetic. What is good about this story is how they get behind the characters of the rescuers so you feel for them. Their attempts are very human and believable and very exciting while remaining plausible. There are some pretty exciting fight scenes along the way too. Sometimes it's frustrating how gullible the people are but cults wouldn't exist without such people. Thank goodness there is a complete enough ending. A couple of small faults. There are quite a few characters and couldn't distinguish some secondary ones for a while Also the religious chants and rants were a little tiresome after a while.
Some praise for the cast. After It's Okay to Not Be Okay I tuned in to see the memorable actress Seo Ye Ji in an earlier series. Extremely demanding role for the actress and she does a great job in some dramatic scenes. I can see why she got cast in It's Okay after this. Ok Taec Yeon and Woo Do Hwan are good to as the guys who try to rescue her. Feel for their dilemmas. The villains are convincing too without overdoing it.