While fulfilling her part of the deal with a so-called "fairy," young Seon-mi makes a critical mistake that catches up with her 25 years later.
Lee Seung-gi
Son O-gong
Cha Seung-won
Devil King Woo / Woo Hwi
Oh Yeon-seo
Jin Seon-mi / Samjang
Lee Hong-gi
Jeo Pal-kye / PK
Jang Gwang
Sa O-jeong / Yun Dae-shik
Lee El
Ms. Ma Ji-young
Lee Se-young
Jung Se-ra / Richie / Zombie / Asanyeo
Kim Seung-o
Lee Han-ju
Sung Hyuk
General Winter / Summer Fairy
Yoon Bo-ra
Alice / Jade Dragon
Sung Ji-ru
Master Subori
Jung Jae-won
Hong Hae-a
Kal So-won
Jin Seon-mi (Young)
Song Jong-ho
Kang Dae-seong
Kim Ji-soo
Na Chal-nyeo / Ja-eun
Michael K. Lee
Jonathan
