After his beloved fiancée is killed by demons, Yi Gwak joins the royal demon-hunting squad and distinguishes himself as a great hero. And though Yi eventually falls in battle, his adventures are just beginning. His spirit is whisked away to Joong-cheon, a place between heaven and earth where souls await reincarnation -- and where the final, epic clash between the forces of good and evil will be played out.
The Restless is a 2006 South Korean period fantasy film directed by Jo Dong-oh, starring Jung Woo-sung and Kim Tae-hee. The film's Korean title, Joong-cheon, is literally translated as "Midheaven". Demon Empire is an alternative English name for the film.