Having failed with his business and gone absolutely penniless, Masao (45) divorced with his wife, and is currently leading a hopeless life in Ibaraki. One day, a mysterious high school girl, going by the name Emiko, showed up before Masao. Every now and then, Masao would be toyed around by Emiko, but little by little he started taking a liking to her loveliness. As days went by, Masao started opening up to Emiko – something that he rarely did to others. However, there was just something about Emiko – something that bothered Masao - that wouldn’t go away.
Hotaru Suzuoka (8 years later)
郊外で小さな金属加工工場を営む鈴岡家は、夫・利雄、妻・章江、10歳の娘・蛍の三人家族。平穏な毎日を送るごく平凡な家族の前にある日、利雄の旧い知人で、最近まで服役していた八坂草太郎が現れる。利雄は章江に断りなくその場で八坂を雇い入れ、自宅の空き部屋を提供する。章江は突然の出来事に戸惑うが、礼儀正しく、蛍のオルガンの練習にも喜んで付き合う八坂に好意を抱くようになる。だが、ある時、八坂は一家に残酷な爪痕を残して姿を消す。
