Ran Isozaki is a young girl entering junior-high school with her childhood friend Rui Ayase. Ran starts hearing the voice of a mysterious girl one day of various warnings. Strange events start happening around town, and Ran tells Rui about the voice she hears. Rui is not surprised as he recounts another occasion when it was obvious Ran could hear voices and it is explained why Ran has two cats at home (a younger Ran discovering two abandoned kittens in the park). In addition to the voice, Ran sees images of the girl's childhood and her mother calling her a freak before abandoning her...