15 years ago, an elementary school student named Emiri transfered from Tokyo to an elementary school in the small town of Ueda. Emiri soon became friends with Sae, Maki, Akiko and Yuka. Emiri invited her friends to her house and had good time.
One day, Sae discovered that her antique doll is missing from her case. Later, the five friends talk about the recent thefts of antique dolls in their town. Sae tells her friends that her antique dolls is missing as well. While they play volleyball at school, a man picks up their volleyball and gives it back to the girls. The man then asks if someone could help him fix a ventilation opening in the gym and points towards Emiri. Emiri says yes and follows the man. The other four girls continue to play and, after awhile, notice that Emiri still hasn't returned. The girls decide to go to the gym where the man and Emiri went. When the girls get inside of the gym they find Emiri dead. The four girls cannot remember the man's face and, because of this, the man is never apprehended.
Several months later, Emiri's mother Asako (Kyoko Koizumi) invites the four girls to her house on Emiri's birthday. Asako sits in front of the four girls and tells the girls that she is sick of hearing that the girls could not remember the man's face. Asako also tells the girls that if the man is not caught the girls should make atonements for their wrongs. 15 years later, the lives of the four girls are in difficult states because of what happened in their past.