Such a cool idea for a show and one so well-executed. I am a little disappointed that they left us on a cliffhanger since usually the story is wrapped up within one season, so I'm hoping they'll eventually do a second season. I must say this show could have gone in a lot of different directions and I'm glad that it didn't have a predictable plot. This is definitely in my top 5 for a good suspense/thriller/mystery drama and one that I would recommend to those who are new to watching kdramas, although don't be surprised if other shows don't measure up.