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.

Lee Min-hoas Lee Gon
Kim Go-eunas Jung Tae-eul / Luna
Woo Do-hwanas Jo Eun-sup / Jo-young
Kim Kyung-namas Kang Shin-jae
Jung Eun-chaeas Goo Seo-ryung / Goo Eun-ah
Lee Jung-jinas Lee Rim
Jeon Moo-songas Lee Jong-in / Prince Boo-young
Kim Yeong-okas Noh Ok-nam
Jeon Bae-sooas Jung Do-in
Seo Jeong-yeonas Song Jung-hye
Kim Eun-sook