Gripping from the first episode. Excellent characters with perfectly fitting cast of actors. I really liked that they chose an actor who had similar features to Dong Jin, to play his father.
I loved the camaraderie between them as soldiers and the relationship between Dong-jin and both his canine partners was very believable and realistic.
There was no overacting, but lots of tension and mystery. Tiny bit of romance, which didn't get in the way of the main plot, but actually added to it.
I also really liked actress Moon Jung-hee and her more mature but tough yet understated character. We need more like that!
I feel it's a shame there were only 10 episodes though, as I am not clear on exactly what happened to the item being searched for. I thought it was found and handed over, yet it eventually appeared not.
An investigation should have been filmed to at least round up things a bit more clearly, which would have benefited the drama as a whole. The ending was quite abrupt for some of the story line, which is a shame.
Having said that, I found the 3 different elements of the story really intriguing and binge watched the whole series! There was far more I loved than didn't and it's one I'd happily sit through again.