The killing vote and the whole thing is good but we can easily guess some characters role in this drama no one questioned heroin sister for being in the live with gaetal and the boy who killed jihoon is escape easily.. no one talk about that.. at some points there is no logic and there is no explanation why that doctor helped kwon and why the police office help to mix nicotine in Lee's drink and who is he or how they make him to help. and the people who helped to escape jihoon from Hyun how did they know jihoon is gaetel who texted them.. if you watch this drama just for thriller without expecting perfect logic this is good drama