In a small mountain village called Hinamizawa, Rika Furude and her friends spend their days happily playing games and enjoying life. When transfer student Keiichi Maebara joins their group, he becomes the only boy in their circle. However, as Keiichi grows closer to his friends, he begins to notice strange behavior and dark secrets lurking beneath the surface. Meanwhile, an observer watches these events unfold, reminded of similar stories from the past. Using their knowledge, they try to fix the broken worlds. But when unexpected variables arise, the observer realizes they don't know how to prevent the impending tragedy. Fear grips them as they attempt to stop the inevitable.