- Drama: Bulgasal: Immortal Souls (English title) / Immortality (literal title)
- Revised romanization: Bulgasal
- Hangul: 불가살
- Director: Jang Young-Woo
- Writer: Kwon So-Ra, Seo Jae-Won
- Network: tvN
- Release Date: December 18, 2021 —
- Runtime: Sat. & Sun. 21:00
- Language: Korean
- Country: South Korea
Dan Hwal was a human 600 years ago. While he was carrying out his mission as a military officer to erase the remnants of the former dynasty, he became immortal. He has been immortal for the past 600 years.
Min Sang-Woon used to be immortal. She is now reincarnated into a human being and lives as a human. After she went through a tragic event, she changed her name and identity. She lives in hiding and looks to exact revenge.
Ok Eul-Tae (Lee Joon) is immortal. Unlike Dan-Hwal, he enjoys his immortality, as well as power and wealth.
In the past, Dan Sol (Gong Seung-Yeon) used to be Dan Hwal ’s wife. She has something special.