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.
For example, this is only a hypothesis,
،على سبيل المثال، هذا افتراض فقط
Ist nur eine Vermutung, aber …
No es más que una hipótesis,
No es más que una hipótesis,
C’est juste une supposition…
Per esempio, ma è solo una mia ipotesi...
Por exemplo, é apenas
 a minha opinião,