To be candid, I was not sure if this would be a good drama because of how dark it seemed, however I watched the trailer and decided to give it a try. This show was AMAZING! It has sci-fi elements as well as mystery, and drama. In some cases, it had comedy, but it does not show up often. The acting was a little robotic at the beginning, but I think it fit the story very well because the characters start to open up more. In my opinion, it had great character development and growth. This drama reminded me of the drama, "Signal" which is also really good. If you have seen that drama, I recommend this one for you (if you haven't seen "Signal" go watch it NOW!).