Korean emperor Lee Gon tries to close the doors to a parallel world which was opened by demons; a detective tries to protect the people and the one she loves.
as Lee Gon
as Jung Tae-eul / Luna
as Jo Eun-sup / Jo-young
as Kang Shin-jae
as Goo Seo-ryung / Goo Eun-ah
as Lee Rim
as Lee Jong-in / Prince Boo-young
as Noh Ok-nam
as Jung Do-in
as Song Jung-hye
as Park Moon-shik
as Jo Hae-in
as Lee Gon's Secretary
as Jang Michael / Jang Mi-reuk
as Myung Na-ri / Myung Seung-ah
as Seok Ho-pil
as Kim Hee-joo
as Kim Ki-won
as Young Lee Gon / Lee Ji-hun
as Young Jung Tae-eul
as Young Shin-jae / Kang Hyun-min
as Moon Seung-ih
as Yoo Kyung-moo
as Young Yoo Kyung-moo
as Min Hwa-yun / Park Sook-jin
as Kyu-bong
as Detective Shim
as Kyung-ran
as Park In-young
as Lee Jung-hoon
as Prime Minster's Adviser
as Secretary Kim
as Prime Minster's Staff
as Kim Sung-ae
