Jun-Ho Lee a cynical and old- fashioned Police Officer, is having a hard time investigating a case where a Serial Killer (Sasaeng Fan) is murdering Celebrities such as Kpop Idols and KDrama Actors. Since Detective Lee is clueless about the Korean Celebrity Life.. He has to ask for help. Kpop Boygroup "BRIGHT" is willing to help him. Suddenly, a new World is opening up for Jun-Ho.