OMG. Okay, the premise sounded very interesting, and the drama started out very well. I enjoyed the back and forth between past, plane crash etc, and present. All the characters had substance. Loved it for the first, say, 6 or so episodes. Then stupidity happened. Lots of it, on the part of the writers and the characters. Failed logic, the frustration of those 'trapped w/psycho killer but too stupid to hide from him" horror films I hate, total leaps of idiocy - I almost stopped watching this by episode 9. Then it got better, somewhat. The island scenario finished, so the above mentioned stupidity vanished. It became a recognizable suspense plot, complete with scheming chaebols & corrupt prosecutors. Not very original but since the acting was excellent & I like most of the cast I could manage. By episode 14, EUREKA! Some brains emerged! I liked that episode! Then the writers got hit once again by the stupid bug, which eroded the logical progression of the narrative into increasingly WTF moments, concluding with what has to be the most insane, ridiculous, maddening ending I've ever seen in KDrama. I had held out hopes of one of our supposed murder victims being resurrected - which would have made as much if not more sense than what the writers forced on us, plus made so many of us much happier - but noooo, that was not to be :( Do not waste your time on this, really, unless plot actually means nothing to you. On the plus side, the interactions of the characters in this show was excellent - I totally enjoyed watching them as long as I forgot whatever plot point was supposed to be happening.