Kyung-chul is a dangerous psychopath who kills for pleasure. Soo-hyeon, a top-secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take vengeance against the killer, even if it means that he must become a monster himself.
A struggling musician takes a job teaching music to middle school children in a rural mining town.
Although born a daughter of an aristocratic family, Jin-yi discovers the secret behind her birth and enters into a life in a brothel as a gisaeng.
Kim Nam-woo struggles through life as people around him constantly leave him; his best friend, Jun-ho, is going to study in Seoul and in some ways his widowed mother is "leaving" him too by paying more attention to her new boyfriend. To escape, he goes to a dream world, where he meets a girl named Mari. The story follows Nam-woo in discovering himself and maturing.
