At first, four swordsmen hired to bring back a runaway concubine appear to be competent mercenaries, but soon prove themselves to be a bunch of incompetent buffoons. Their leader, Yae-rang, only has one fighting stance: to drop his sword, make faces at the enemy and pinch his own nipples. Yo-i, is just as idiotic, but at least has a touch of humanity as he works as a mercenary only to earn money for his kid sister. The four take the concubine and her lover into custody, but also accidentally manage to somehow ruin the chance for the ghosts of five murdered courtesans to ascend to heaven. The warriors agree to kill the man responsible which will set the ghosts free, but they must be taught a few tricks by the ghosts as their existing martial arts skills are nearly useless.
Watch Neuk-dae-so-nyeon: Summoned by an unexpected phone call, an elderly woman visits the country cottage she lived in as a child. Memories of an orphan boy she knew 60 years ago come flooding back to her.
It is AD 924, at the end of the United Shilla Dynasty. Continuous riots sweep the land ruled by a corrupted government. Evil forces are rampant and malicious demons roam the land. YI Kwak, born with the powers to see spirits, joins the royal demon hunting squad, 'Chuh-yong-dae' after losing his fiancée, Yon-hwa to evil demons. YI Kwak excels as the most talented warrior of Chuh-yong-dae and the royal squad seems to gain momentum as powerful fighters against the forces of darkness. Then one day, YI Kwak drifts into Joongcheon, the world of the dead through a strange shrine. Joongcheon, the intermediate world between Heaven and Earth, a place souls remain for 49 days, preparing for reincarnation.