‘The King of Demons’ is a fantasy historical drama that takes place when the Demon King, who leads a demon army to destroy humans, resurrects from hell. The main character, Cha Woo Young, collects ghosts and runs a ghost market. During a new case request, he is faced with a group trying to resurrect the Demon King who was sealed 900 years ago, and to fight against it, he joins hands withthe Goblin King, Kim Man Su. The epic story of two people who have started a life-threatening battle to maintain their livelihood and protect the world’s order by confronting the Demon King.
(Source: NamuWiki)
~~~Adapted from the webtoon with the same name.