Ji Hyun Woo basically comes out as 'Kang Dae Gu' a chivalry novelist who writes stories about martial arts, but he's in fact jobless. And before he became like this, he was a law student. But while he was preparing for his bar exam, he witnessed his lawyer friend commit suicide. After that incident, he threw away his hopes and dreams and became a writer.

Hyun Ji-seok, a university professor, and Go Mi-yeon, a scriptwriter, were high school sweethearts, who discover that they are cousins. They break up, but find themselves attracted to one other once again when they meet in Seoul four years later.

The Kumiho family circus in town -- and with it, apparently, a mysterious murderer. The members of motherless family aren’t helping their case with their strange remarks about humans and their initial performances, cavalcades of dismemberment and torrents of blood which terrify the local kids. Pretty soon, a dour, downbeat cop is on the tail of the plucky, bumbling Kumihos. Or rather, tails -- “kumiho” is the word for the fox spirits of Korean mythology, and this clan from Nam Mountain near Seoul, temporarily disguised as people thanks to a magic spell, must eat human livers during a brief, once-in-a-millennium lunar eclipse to shed their foxy nature and assume permanent human form. When the sleazy reprobate on the run from mobsters stumbles into their eerie household, he soon finds himself a little too enthusiastically involved in their scheming after human flesh—and involved with the sexy elder-sister fox spirit as well!

Kim, a Taekwondo champion decides to give up his fighting career for good in order to take care of his daughter Sa Rang. But when an evil gambling kingpin kidnaps Sa Rang, Kim must agree to fight in a rigged boxing match in exchange for Sa Rang's freedom.