During a kidnapping plot, a group of hapless assassins disturb some ghosts who take pity on then and lend them their supernatural martial arts skills.

A group of deadly assassins kidnap a hostage in the hope of getting a high ransom but when they manage to lose themselves in a forest and end up spending the night in a haunted house they manage to disrupt the plans of the ghosts to descend to heaven. The assassins hatch a plan to solve the problem but in doing so reveal themselves to be incompetent, so the ghosts decide to give them some training themselves.

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.—Anonymous