A suspense-filled story that poses the key question: "What if we could identify psychopaths in advance?" The ruthless murders committed by a deranged serial killer have left the entire nation gripped by fear, and chaos reigns. Jung Ba Reum, a rookie police officer seeking justice, comes face to face with the killer. As he survives the dangerous encounter with the psychopath, Jung Ba Reum watches his life change completely before his very eyes.