"The King: Eternal Monarch" is a South Korean television series that aired in 2020. It follows the story of Lee Gon, a modern-day king of the Korean Empire, who discovers a parallel universe. The series explores themes of love, duty, and the struggle between good and evil as Lee Gon attempts to close the portal between the two worlds. The drama features a star-studded cast, including Kim Go-eun as Jung Tae-eul, a detective who becomes entangled in Lee Gon's quest. Directed by Kim Eun-sook, the show combines elements of fantasy, romance, and action, captivating audiences with its intricate plot and stunning visuals.