Eighteen years old, a senior in high school, Seo Yumi has never gone though her rite of passage into womanhood...until today, when she rushes to the bathroom to find the on set menstruation dripping down her thigh. However, this biological marker in Yumi's life has far reaches consequences in the universal struggle between good and evil. The young girl is fated to be the mother of evil, prophesied to spawn the children of hell, and so has now become the target of a horde of demons all bent on planting his seed in the wicked womb. However, also spurred by Yumi's maturation, the forces of good from the world's religions dispatch various protectors to keep her chaste. And just when it seems that evil might actually triumph over good, a free agent in this ancient clash, a young hot shot freshman named Tae Chail, falls in love with Yumi and swears to die protecting her.