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 there is something I've been wondering about.
.ولكن هنالك شيءٌ كنت أتساءل عنه
Was ich mich aber schon
die ganze Zeit frage …
Pero me he estado preguntando algo.
Pero me he estado preguntando algo.
Mais quelque chose me tracasse.
C'è una sola cosa che continua a impensierirmi.
Mas tem uma coisa que está
 me deixando intrigado.