Gam So-hyun

Doo Hyeon, who goes by the name the "Goblin", goes to prison for taking the fall for Yeong Min who killed their boss. Released after 10 years, Doo Hyeon had been living a normal life, until he found out Yeong Min had been taking advantage of his name "Goblin". Yeong Min goes so far as to kidnap Doo Hyeon's daughter to keep his mouth shut. Enraged, Doo Hyeon seeks revenge and announces the return of the real "Goblin".

Jiwon, a motivated new police officer, is strangely bothered after meeting Osun, a social worker. On a hot summer day, a kidnapper sends a message saying, ‘If you want to save the kidnapped child, donate money to the welfare center.’ The incident becomes a national concern as the media report it. Somehow, Jiwon doubts the link between the case and Osun.

Hye-jeong, a lonely young girl who has drifted away from her family and avoids personal relationships, works in a factory, lives in a shared apartment, and leads an insipid and meaningless existence until one night she discovers that she has become a ghost.