Gurus in the late Goryeo dynasty try to obtain a fabled, holy sword, and humans in 2022 hunt down an alien prisoner that is locked in a human's body. The two parties cross paths when a time-traveling portal opens up.
Muruk
Ryu Jun-yeol
Guard / Thunder
Kim Woo-bin
Ean
Kim Tae-ri
Moon Do-seok
So Ji-sub
Madam Black
Yum Jung-ah
Mr. Blue
Jo Woo-jin
Jajang / Doctor
Kim Eui-sung
Min Gaelin
Lee Hanee
Right Paw
Shin Jung-keun
Left Paw
Lee Si-hoon
Thunder (voice)
Kim Dae-myung
Young Ean
Choi Yu-ri
Gae-ttong
Kim Ki-cheon
Shaman Dosa / Alien Robot (voice)
Yoon Byung-hee
Murderer
Ji Gun-woo
Sam-sik
Yoon Kyung-ho
Fellow Doctor
Ok Ja-yeon
Shaman Dosa 2
Lee Hyun-gul
Old Lady
Kim Hae-sook
Master Hyun
You Chea-myung
Hong Eon-nyeon
Jeon Yeo-been
Min-sun
Kim Min-seo
Inn Owner
Lee Sun-hee
Principal
Baek Hyun-joo
Choi
Choi Kwang-je
Bride
Shim Dal-gi
Gisaeng
Oh Chae-eun
Hyeong-bang
Jang Jun-whee
Ge-gan
Lee Dong-yong
Fisher
Kim Jung-han
Thief
Kim Chan-hyung
Steward
Lee Dong-hee
Haava
Song Ji-hyuk
Doo-sik-i
Kim Tae-eung
Police
Kim Sun-hyuk