PLS READ THIS COMMENT BEFORE WATCHING.
Don't watch this show if u don't want to feel betrayed at the end.
The show started with a great plot ,wonderful visuals and excellent cast. It was surely different from other Korean dramas due to its plot uniqueness and its international touch. Once u finish first season u will be dragged in depth to the story and will begin to eagerly wait for the character development and how everything will be resolved at the end. But unfortunately the writers will fool u at the end of finale season by giving no end. Yes u read it right ' NO END'.While u are watching the finale for the answers unexplained from the beginning, the writers will just simply stop the show without showing anything ,without even the lead characters meeting ,without any explanation of the whole plot,without giving even a proper open ending if that was what they intended to give...just by leaving u clueless and all flustered with the thought of wasting your 18 plus hours for this sadist play of writers. They will just show u some cartoon at the end showing what will happen in future and that will totally irritate you. U will be angry at yourself about why u fell into this cheap play of writers or production team whoever concerned just by getting impressed with the cast and trailer. I rate this drama 2/10 just because of the ending otherwise it would have been around 8.If there is no season 4 it will be a complete waste of your time and effort to watch this. I mean it.