A deity unleashes a demon into the human world that opens a portal to the parallel universe. In an effort to protect his loved ones from the danger brought about by the portal, a Korean emperor teams up with a modern-day detective to shut the bridge between the two worlds.
- Drama Title: The King: The Eternal Monarch
- Other Titles: The King: Forever Sovereign
- Genre: Fantasy, Romance
- Director: Baek Sang-hoon
- Writer: Kim Eun-sook
- No. of Episodes:
- Broadcast Period: 1st Half, 2020
- Time Slot:
- Running Time:
- TV Network:
- Production Company(s): Hwa&Dam Pictures
- Preceded by:
- Followed by:
Cast & Characters
Lee Min-ho as Lee Gon, the emperor of the Korean empire who teams up with a detective from the parallel world to close the portal.
Kim Go Eun as Jung Tae-eul and Luna. Jung Tae-eul is a detective in the Republic of Korea while Luna is criminal in the Korean empire.
Woo Do-hwan as Jo Eun-seob, an ordinary public service worker who lives in modern-day Korea, and Jo Young, the bodyguard of Lee Gon in the Korean empire.
Jung Chae-eun as Koo Seo-ryeong, the youngest prime minister of the Korean Empire. She is an ambitious woman who goes to any length to succeed.