Kirie Goshima, a schoolgirl living in Kurouzu-cho, grows worried about her best friend Shuichi Saito's father, who has become fixated on collecting and staring at spiral patterns, ignoring everything else. Following Shuichi's father's suicide inside a washing machine, his cremated ashes drift over the town in a massive cloud. This obsessive behavior begins to affect Kirie's father and others, while residents throughout the town start physically mutating into spiral-shaped creatures.
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