Strange rumors start to spread at the catholic girls' high school after Unjoo commits suicide one night. Unjoo's younger sister Jung-un, who attends the same school, gets suspicious about Unjoo's death. After persistent investigation, Jung-un finds out that on the night of the incident, Soy, Eugene, Eun-young, and Unjoo tried to commit a joint suicide after making a vow on blood. But the other three are still alive...

Demons have infested Earth and only one warrior stands between the dark and the light: Saya, a half-human, half-vampire samurai who preys on those who feast on human blood. Joining forces with the shadowy society known as the Council, Saya is dispatched to an American military base, where an intense series of swordfights leads her to the deadliest vampire of all. After 400 years, Saya's greatest hunt is about to begin.

Demons have infested Earth and only one warrior stands between the dark and the light: Saya, a half-human, half-vampire samurai who preys on those who feast on human blood. Joining forces with the shadowy society known as the Council, Saya is dispatched to an American military base, where an intense series of swordfights leads her to the deadliest vampire of all. And now after 400 years, Saya's greatest hunt is about to begin.

The cold dead of night is a dangerous time to be near the Shinyo Academy. Girls have begun to mysteriously disappear without a trace. Some say the girls are just runaways, but with each new disappearance, a lingering fear grows ever stronger: fear that a shinigami - the very spirit of death - is prowling through the streets of the city. They say you never see it coming. A lone whistle splits the dark silence, and it suddenly appears behind you to steal your soul...