- Other Titles – Immortality, The Immortal, Bulgasal
- Director – Jang Young Woo
- Screenwriter – Seo Jae Won, Kwon So Ra
- Genre – Fantasy, Supernatural
- No. Of Episodes – 16
- Airing Period – Dec 18, 2021 to Feb 6, 2022
- Duration – 60 min
- Network – tvN
A drama that revolves around two characters – Min Sang Un, a woman who was once a bulgasal but is reincarnated as a human and remembers all of her past lives, and Dan Hwal, a man who has turned into a bulgasal during the Joseon dynasty while working as a military official.
Ok Eul Tae is another bulgasal living in secrecy. He has enjoyed immorality for the past centuries and has collected great wealth, which he uses to control politicians, businessmen, and the media.
Dan Sol is the daughter of a powerful family who ends up marrying Dan Hwal because of her father, in the past. She has something special that others cannot make sense of.
- Lee Jin Wook as Dan Hwal
- Lee Joon as Ok Eul Tae
- Kwon Na Ra as Min Sang Woon
- Gong Seung Yeon as Dan Sol
- Kim Woo Seok as Nam Do Yoon
- Jung Jin Young as Dan Geuk