The Metropolitan Police Department '0'section, known as an organization in the police department that investigates a closed case. Well-trained detective in the '0' section, Rei, is looking for her memory that was lost during the training, while also investigating a human traffic which young woman being a victim. One day, classified killer virus was seized by rising terrorists. To investigate this case, public safety sent Sarah Kodama who specializes in molecular biology and computer, to work with Rei but Rei refuses to work with Sarah. Sarah was curious about mysterious Rei, so she starts to collect Rei's information and goes to see Rei's former boss, Asami. However, the man who appeared in front of Sarah was an assassinator who contemplates destruction of '0' section. What happens to Sarah...!? What is in Rei's lost memories!?

From the moment she and her fellow students arrive in the mountain village of Yasaka, Mikoto knows that there is something very wrong with this tiny town. Can it really be true that, for 50 years, not a single girl has been born in this isolated community? Despite the fact that Mayor Amano and the other all male residents have enthusiastically welcomed her and the other three coeds attending Professor Ashihara’s overnight seminar, Mikoto can’t shake the sense of increasing dread that consumes her. Something horrible has happened here. Something that is about to happen again. Because the town has been waiting for her. And the other girls. From the pages of the hit online manga published in Web Comic Gamma, the nightmare is about to begin!