I have never written reviews on Imdb but this just made me come here and write it. Not a single boring episode. So brilliant. The storyline, the games, the acting, the twists! Best best best, could not have been better. Ji chang wook has done such an amazing job but my heart goes out to Wi Haa Joon. Goosebumps literally, some of the scenes were nail biting, edge of the seat good. Whoever came up with the story has a brilliant mind. I wasn't planning on watching it but I just thought I'll see the first episode . Ended up completing the whole series. So many emotions. A rollercoaster ride. Highly recommended.