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.
Ryu Jun-yeol
Kim Woo-bin
Kim Tae-ri
So Ji-sub
Yum Jung-ah
Jo Woo-jin
Kim Eui-sung
Lee Hanee
Shin Jung-keun
Lee Si-hoon
Kim Dae-myung
Choi Yu-ri
Kim Ki-cheon
Yoon Byung-hee
Ji Gun-woo
Yoon Kyung-ho
Ok Ja-yeon
Lee Hyun-gul
Kim Hae-sook
You Chea-myung
Jeon Yeo-been
Kim Min-seo
Kim Min-joon
Lee Sun-hee
Baek Hyun-joo
Choi Kwang-je
Shim Dal-gi
Jo Ha-i
Kim Roo-ah
Kim Kang-il
Lee Dong-hee
Kim Chan-hyung
Park Moo-yum
Song Yeong-gwang
Lee Dong-yong
Jang Jun-whee
Han Sung-soo
Kim Jung-han
Kim Wang-do
Kim Se-hong
Kim Man-ho
Kim Min-che
Park Kwang-jae
Choi Cheong-an
Woo Yeon-seo
Kim Woo-hyun
Kim Min-hwan
Kim Jae-hyun
Kim Yoon-do
Gim Jin-uk
Kim Han-sol
Moon Ba-rom
Park Soo-chan
Seong Baek-in
Ahn Jae-won
Lee Tae-hwan
Lee Bo-yeong
Yoon Sang-won
Son Joo-hwan
Kim Dan-bi
Ji Han-ah
Kim Bit-na-rae
Kim Se-jeong
Min Jeong-eun
Bae Yoon-min
Jeong Ji-won
Ji Sung-eun
Jeon Ah-hee
Han Soo-a
Ko Na-young
Park Si-yeon
Song Ji-hyuk
Woo Sang-ki
Han Seung-yoon
Park In-gyoo
Kang Jeong-min
Lee Hee-gyoo
Byun Jin-su
Yang Mi-seon
Lee Byung-wook
Jang Gyoo-sik
Jeon Kyeong-hee
Kang Choon-seon
Kang Cha-wook
Kim Moon-jo
Jo Han-gil
Ryoo Gwan-hoo
Kim Bang-sun
Jeon Eun-mi
Jeong Min-gyoo
Ko Yoo-joon
Jeon Jin-gi
Lee Won-min
Seo Suk-kyu
Han Dong-hoon
Nam Ji-woo
Park Rae-yeong
Im Bo-hyeon
Im Woo-jin
Shin Sae-byeok
Kim Ji-seon
Kim Ye-joo
Lee Joo-hyeok
Ha Si-yeon
Cha Young-ju
Lee Soo-jin
Kim Soo-hyeon
Hyeon Oh-bong
Kim Seung-joon
Park Keon-ryul
Seon In-ho
Lee Dong-seok
Jo Woon-seong
Jo Jin-kyul
Han Ji-hoon
Hwang In-jik
Lee Joon-chang
Lee Soo-hyung
Hwang Jae-woon
Lim Jae-min
Kang Gi-won
Jeong Ye-seo
Min Sae-hee
Oh Chae-eun
Lee Ha-joo
Yoo Dok-hyun
Lee Ga-hyeon
Kim Hyeon-sik
Park Jong-beom
Lee Seop-jeong
Kang Han-byeol
Kim Solomon
Jang Seok-joon
Jeon Won-pyo
Kim Sun-hyuk