In a small town in South Korea, Gyeong-ju (Oh Man-seok), an aspiring crime novelist prone to violent daydreams, murders his landlady in a fit of rage. Gyeong-ju then carefully reconstructs the crime scene to appear like the work of a serial killer who is still on the loose. But when police suspect it's the work of an imitator, Gyeong-ju helps his childhood friend Detective Jae-sin (Lee Sun-gyun) track down the real serial killer, hoping to throw the police of his own trail.