A serial abduction case occurs in a small village "Summon".
It leads the villagers to believe in a rumor that the abducted
ones are to be sacrificed to a certain kind of ritual...
Given that a pair of nuns dispatched from a rural church is
reported to be lost in a forest, the Cathedral finally decides
to send a battle sister "Elina" to the forest in order to
bring the incident to a conclusion......