A psychopath's ruthless serial murders have left the entire nation gripped by fear and chaos. An honest, justice-seeking rookie police officer and a veteran detective with a tragic past, face off against the killer. After their encounter with the psychopath, their lives change completely.
Season 0
Season 1
Jung Ba-reum, a steadfast and honest rookie police officer whose life completely changes after an encounter with a ruthless psychopathic serial killer. This traumatic event drives him, along with his partner Go Moo-chi—a hardened detective obsessed with avenging his parents' murder—to uncover the truth behind psychopathic behaviors.