A good drama to watch.There are some supernatural elements in the drama like visions and ghosts.
What you can expect is for first dozen or more episodes, new case (of rescue/search/other elements) almost every episode kinda like procedural drama but it is about Park Rangers and their teams. There is also the element of Investigation of murders and it is one of the main background storyline. The chemistry between the Main lead is fire even though there is no romance , but they care for each other deeply and are great partners having each others back.
To get to know the drama and all its elements watch first 3 episodes and then decide to drop or to continue watching.
All the actors are great as they should be can't expect anything less from such a spectacular Cast.
Music was great too.