Teropterids are evil beasts which pose as humans and live only to drink human blood. Fortunately for the human world there are groups dedicated to destroying them. A brooding and mysterious girl named Saya is the best teropterid slayer there is, and now, in 1960s Japan, she is sent to a U. S. army base which may be infested...

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Winner of the 2000 Oofuji Noburou Award at the Mainichi Film Awards and the Grand Prize on the 4th Japan Media Arts Festival.