This drama was inspired by a true story that happened in 2017 in Incheon Elementary School. This Story is fictional however, and its about a rookie police officer who is knows to be honest and tries to attain justice faces a psychopath murderer who place the entire nation in fear. This drives him and his partner detective Ko Moo Chi to unravel the truth behind psychopathic behaviors and slowly uncovers the actual psychopath behind all the murders. A Crime thriller with lots of suspense moments that you would not want to miss out!