This is one of those shows where I really don't understand the need for 2 parts. Why did TV or cable stations think they were doing? Did they think it was a good idea to have 2 parts? I waited until Part 2 had finished broadcasting before I watched both. Same with Glory and Alchemy of Souls. All there have suffered from a dismal Part 1 (altho Glory was better). If I hadn't had Part 2 to follow up with, I would have never bothered beyond Ep 2.

The Part 1 of this is slow. It spends at leat 4 episodes building up the characters and giving their back stories. Finally, the mission of the characters begins around episode 5. If I had to wait several months/years for the main story to unfold, I would not have bothered continuing on with Part 2.

The actors are fantastic and I won't go further as many other reviewers already have. Overall, it's a good entertaining drama of a different genre (I'm so over romantic idol dramas) if you're able to binge watch.