I highly recommend this drama to K Drama fans. I just couldn't control myself to watch the next episode. Don't judge it based on the trailer. The drama is something else when you watch it. It starts with action followed by a great story with excellent characters. The story just keeps getting better. The OST is great as well. The VFX is on a different level. K Dramas are taking their game to the next level. The ending will keep you waiting for the second season. Cannot think about what this drama is lacking.