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.
There's no need to think the same things.
.لا حاجة للتفكير بنفس الأشياء
Du musst nicht wie sie denken.
No tienen que hacer lo mismo.
No tenéis que hacer lo mismo.
Tu n’as pas à penser comme elle.
Non dovete pensarla allo stesso modo.
Você não precisa pensar 
as mesmas coisas que ela.