In the fall of 1966, tensions run high on the U.S. Air Force base in Japan on the eve of the Vietnam War. After a series of suspicious suicides in a nearby town, an additional threat has infiltrated the military compound - vampires. A covert team of government agents committed to the elimination of vampires dispatch a mysterious young woman named Saya who, in the guise of a schoolgirl, must uncover the origin of the demonic plague, eliminate the ghastly beasts and stop their reign of terror before time runs out. She is the last remaining original.