This drama is up there with signal as one if the best crime dramas i have watched. Each episodes was remarkable and the concept of the story was fresh and entertaining. If you love a good crime drama...watch this...you won't be dissappointed. The actors gave a brilliant performance. I was abke to have awwww moments while being thoroughly entertained with the serious moments. Its a must watch. If you watch this and enjoy it i recommened voice 1....and signal as well. They too are very enjoyable crime dramas.