In the secluded village of Sotoba, daily life is usually quiet. Megumi Shimizu, known for her lively personality and fashionable style, considers Sotoba a boring place and longs to escape to the city, away from the locals' traditional ways. When a new European-style mansion appears on a hill, Megumi believes its residents must be refined and interesting, so she decides to pay them a visit.
However, Megumi does not return home that night. After an extensive search, she is found the next day, weak and pale, with strange puncture marks on her skin. Tragically, Megumi is only the beginning of a disturbing pattern as Sotoba sees a rising number of deaths. Village doctor Toshio Ozaki, along with priest Seishin Muroi, the reclusive Natsuno Yuuki, and the Tanaka siblings Kaori and Akira, start investigating these mysterious deaths. The horrifying truth behind this outbreak may be more than they can handle, as the dead quickly outnumber the living.