Yi Gon is the third Korean emperor of his generation. His citizens regard him as the perfect leader. But behind this flawless appearance, hides a deep wound. When he was eight years old, his father was murdered before his eyes following a coup. Today, instead of respecting his filial duty, he prefers to escape the palace to attend university conferences. During one of his escapades, he sees himself propelled into a parallel world where he meets Jung Tae Eul, an inspector with whom he teams up with to defeat the criminals but also close the door between their two worlds.
- Other name: 더킹: 영원의 군주,Deoking: Yeongwonui Gunju,Deo King: Youngwonui Gunjoo,The King: Forever Sovereign,The King: Permanent Monarch,The King: Forever the Monarch,The King: Monarch of Eternity,The King: The Eternal Monarch,The King - Lord of Eternity
- Genre: Bodyguard, Detective, Drama, Fantasy, Murder, Mystery, Romance
- Status: Completed
- Duration: N/A min
- Country: South Korea
- Network: N/A
Cast: Ahn Seok Hyeon, Bae Bo Ram, Bae Seong Il, Baek Hyeon Joo, Baek Seung Cheol, Cha Seong Je, Choi Moo In, Choi Woo Seong, Christine Kim, Go Eun Min, Ha Seung Ri, Heo Dong Won, Hwang Se On, Hwang Yeong Hee, Jang Ha Ran, Jang Hae Min, Jeon Bae Soo, Jeon Moo Song, Jeon Noh Min, Jeong Eun Chae, Jeong Ha Dam, Jeong Hyeon Joon, Jeong Shi Yool, Jin Keun Ho, Jo Jae Yoon, Joo Ye Rim, Kang Hong Seok, Kang Ki Doong, Kang Moon Kyeong, Kim Bo Min, Kim Dong Gyoon, Kim Go Eun, Kim Hyeon Woo, Kim Jeong Yeong, Kim Jong Tae, Kim Ki Moo, Kim Kwi Seon, Kim Kyeong Nam, Kim Wook, Kim Yeong Ok, Kwon Yool, Lee Hae Yeong, Lee Ho Cheol, Lee Hong Nae, Lee Hwang Ui, Lee Hye Ra, Lee Jeong Jin, Lee Ji Hyeon, Lee Min Ho, Lee Se Rang, Lee Ye Won, Lee Yoon Sang, Moon Dong Hyeok, Moon Woo Jin, Park Hoon, Park Jeong Eon, Park Ji Yeon, Park So Jin, Park Won Sang, Park Yong, Ryu Seong Rok, Seo Dong Gab, Seo Jang Hyeon, Seo Jeong Yeon, Seo Woo Jin, Seol Woo Hyeong, Seong Chan Ho, Shin Hyeon Jong, Shin Soo Yeon, Son Kyeong Won, Song Sang Eun, Tae In Ho, Woo Do Hwan, Woo Ji Hyeon, Yang Hyeon Min, Yang Ji Soo, Yang Jo Ah, Yoo In Hyeok, Yoon Jeong Hyeok, Yoon Joo Man, Yoon Seong Woo