Early summer, Keiichi had just moved to a remote mountain village. As he becomes close friends with a group of girls, he was enjoying his life in the village. However when he starts to become suspicious that his friends may be deeply involved in successive murders that occur every summer, the situation around Keiichi gradually starts to turn into something more sinister.

Maebara Keiichi, a young teenager, has recently moved from the city to the rural village of Hinamizawa with his family. He is adjusting quite well to his new life, making friends at the small school, playing games, passing time in relative happiness, when suddenly a gruesome murder occurs. A mystery begins to unravel — tracing back to happenings five years ago. As Keiichi learns more about these strange events, he wonders if he will be able to face the truth behind all of this.