Living in a small village, Megumi's two main interests are classmate Natsuno Yuuki and a European-style house on a hill. One day, when her fascination with the house leads her to climb the hill, she vanishes.

The strange deaths continue as Dr. Ozaki struggles to find the cause of a mysterious anemia afflicting residents, while his friend Mikiyasu's wife, Nao, succumbs to the illness. Natsuno finds himself entangled in growing tension with classmate Masao and eerie encounters with the enigmatic Kirishiki family. Meanwhile, Seishin meets the unsettling Sunako Kirishiki, whose fascination with death and Seishin's past hints at deeper horrors to come.