I basically like that with Jirisan there's a drama where actually the main star is nature itself with all it's beauty and dangers, which are definitely explored here beside the supernatural induced crime story. The shooting of the nature aspect was flawless in my opinion. I guess one can hardly find dramas similar in that aspect (proove me wrong). For me it would even work as a South Korea travel advertisement, knowing that not all scenes are actually from Jirisan area.

On the other hand, the expectations one could have from knowing the screenwriter and director are some of the industries top people in the last years were kind of disappointed. For the screenwriting I could sense some similar strategy like done in Signal, but nowhere close living up to that level of tension done back then. Also the direction was confusing at points and often let me think, why did he choose to do it like that, while I was okay with the jumps in time. A similar aspect used in Signal.

For the acting I generally liked the whole cast, especially the ML Joo Ji Hoon with his friendly and nice attitude and the rookie ranger Go Min Si. Regarding Jun Ji Hyun I thought in this particular drama she couldn't really shine, may be also due to the role itself, as of course it's not her usual one. She couldn't carry the show sometimes and her expressions in general felt a bit pale...may be another actress could've been better. It seemed somehow they tried to make sure all positions are filled with well-established stars, not to take any risk.

The crime story was okay, had some nice twists and always tried to connect to the aspect of the rangers and the mountain. At the end kind of predictable. I would have wished for some romance, so it's just subtle, but knowing the author it couldn't be expected easily...

Though overall I admit it's complaining at a high level and I recommend the show especially to everybody wanting to look at an entire drama set in a nature environment. Somehow it just couldn't live up to the hype. So some good opportunities wasted here for such a setting...may be next time...