The plot is dark and it's only for mature audience. One can't rely on any of the character. One second you may think they are nice and the next second they must be back-stabbing someone. This drama is full of thrills, twists, betrayals, revenge. I feel it has that 'makjang' thing taking things far-fetched. The episode ends with such cliffhanger that will make you watch next episode. You'll be screaming on top of your lungs swearing at those stupid, cunning characters but you'll still watch it. I was (and i'm still) surprised that the ratings has crossed that of other dramas. This maybe because the things going on is quite realistic.