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.
and thought in a more diverse way than we do now.
.وفكرنا بطريقة مختلفة عن طريقة تفكيرنا الآن
und wir dachten den Dingen
auf vielen Wegen nach.
et pensent de différentes façons.
e pensávamos de formas muito 
mais diversificadas do que agora.