During a fiercely hot summer in Sotoba, a peaceful and quiet village with a population of 1300 people, a series of bizarre deaths begin to occur. At the same time, a strange family moves into a long abandoned mansion in the region. Hospital dean Toshio Ozaki cannot figure out the cause of death in the deceased, initially suspecting an epidemic. As investigations continue between the hospital staff and the residents, it turns out that the village is being attacked by vampires. The story takes place in a small and what appears to be a peaceful village called, Sotoba. However, this is no ordinary village. Death seems to be tormenting the village and it is a common thing in Sotoba. Natsuno Yuuki, a new resident in Sotoba, hates the village and wants to move back to the city. However, he is determined to solve the mystery behind the strange death occurrences.