Vampires make wine from donated blood. The Vatican oversees legal bloodletting. Factions vie for access to the finest blood vintages. YeonSeo, a human-vampire hybrid, is torn when fellow student MeoRu's irresistible blood lures vampires.

Vampires have evolved in the 21st century. They are no longer drinking human blood from biting their necks. They drink a special vine they make out of a little blood from blood donation bags. The Vatican made a special agreement with the human world to punish those who are illegally drinking human blood. The power struggle among vampires over the finest wine with the blood of great men started. YeonSeo is a half-human and half-vampire. At her high school, MeoRu has such sweet blood that he is attracting other vampires. Will she follow her instinct or her love?