The cow woman is believed to be the sign of a huge catastrophe that is about to occur. It is said that she dies when the catastrophe is over. In some regions, the cow woman is worshiped as a prophet who warns of future misfortune. Asuka, who has joined a training camp, decides to head off to the site of an unsolved murder together with her four classmates. It is there that they find an isolated house where they manage to be let in by making up an excuse. However, once inside.