In a small town in Japan, Kirie comes upon her boyfriend’s father silently videotaping a snail. Later, the mans obsession with spirals becomes more and more bizarre, ending in his suicide in a washing machine which turn his body into a spiral. Soon other inhabitants become possessed with different forms of spirals.

High school student Juri leaps to her death. Afterwards, Juri wanders to her house, school and street. She feels loneliness as nobody else is able to see her. She talks to those that she comes across including her mother and classmates, but nobody responds to her comments. Juri then sees a horrifying monster, which she never saw prior to her suicide. She calls the scary monster “Bug Man”. When the mind of humans become weak, the Bug Man tempts those to commit suicide. One day, Juri walks along the street as usual. She then meets a girl that is able to see Juri. Juri names the girl Ringo-chan and plays at the park with her. Their happy moments does not last long. When they come back from the park, Juri sees Ringo-chan’s mother with a grim face. The Bug Man is standing behind her mother.