The deaths of Tachibana Eisuke and Mishima Ayaka raise red flags with forensic department member Inokari Tetsuji. While Tachibana is hated by Inokari for an incident in the past, he is suspicious of the reported double suicide angle as their times of death are off by an hour. Naoki decides to undertake the investigation and heads off with Shindo to begin. However, the apartment building where they jumped off the balcony has no working cameras inside. Furthermore, autopsy results cause the mystery to only deepen further.