In June 1983, Keiichi Maebara relocates to the peaceful, isolated rural Japanese village of Hinamizawa. He quickly befriends a lively circle of schoolgirls: Rena, Mion, Satoko, and Rika. Keiichi embraces village life, joining their club and enjoying carefree games. However, a dark undercurrent soon shatters this idyllic facade. He discovers that every year during the local Watanagashi festival, one person is mysteriously murdered and another vanishes without a trace, a phenomenon locals attribute to the curse of a local deity, Oyashiro-sama.Driven by escalating paranoia, Keiichi begins to suspect his new friends are hiding sinister secrets regarding these unsolved crimes. As
psychological tension mounts, the narrative shatters into distinct story arcs, acting as separate loops in time. In each arc, the peaceful village transforms into a waking nightmare. Driven by stress, trauma, or the perceived curse, different characters succumb to madness and paranoia, turning against one another in brutal, bloody ways. Keiichi, Rena, Mion, and Satoko each take turns snapping under
psychological pressure, committing horrific acts of violence against those they hold dear, only for the timeline to reset, offering a fresh chance at survival.At the center of these repeating tragedies is Rika Furude, the village shrine maiden. Bound in a seemingly endless time loop, Rika experiences her own gruesome murder at the end of every June, only to awaken weeks earlier to try and alter fate. Joined by Hanyū, the benevolent deity behind Oyashiro-sama, Rika desperately seeks a timeline where she survives the cursed festival.The core mystery unravels as the true antagonists are exposed: a human conspiracy rooted in village politics, medical experimentation, and the ruthless militant faction known as the Tokyo syndicate, spearheaded by the manipulative nurse Takano Miyo. Takano seeks to orchestrate a complete massacre of Hinamizawa to validate her adoptive grandfather’s discredited sociological theories about the local parasite, a microscopic organism native to the village that induces extreme paranoia when sufferers are separated from Hinamizawa's unique climate.In the final overarching arc, the friends unite, pooling the fragmented knowledge and memories they have retained from their previous horrific nightmares. Trusting one another completely, they defy the preordained tragedy, outwit the human conspirators, and dismantle the deadly plot once and for all, finally breaking the endless cycle of bloodshed in Hinamizawa.