In the process of investigating Director Shindou's murder, Nishinosono and Saikawa learn the details of Shiki's multiple personalities and the murder of her parents that took place 15 years ago. The two of them try to figure out what she was thinking in order to find a clue.  In doing so, Nishinosono is forced to confront her own past.
But why did she make so many cookies?
ولكن لماذا صنعت هذا العدد الكبير من البسكويت؟
Aber warum backt
sie so viele Kekse?
Pero ¿por qué habrá horneado tantas?
Pero ¿por qué habrá horneado tantas?
Mais pourquoi a-t-elle préparé
tous ces biscuits ?
Ma perché ha preparato tutti quei biscotti?
Mas, por que será que
 ela fez tantos assim?