Higuchi's wife, Miki, was murdered by a psychotic killer, and he hates Tachibana at the Emergency Command Center for failing to save Miki's life. Meanwhile, Higuchi is transferred to the Emergency Command Center.

In order to save a college girl who is being held captive, Tachibana relies on her hearing to locate the culprit. After the incident, Higuchi wonders whether Tachibana really heard the sound.

The sister of one of the ECU team members has been abducted. Higuchi and Ishikawa look for her based on the GPS on her cell phone and Tachibana's special hearing ability. However Higuchi and Tachibana begin to realize that a trap has been set in this abduction case.

Several hours have passed since Aoi was abducted, and she is in imminent danger of being raped. Tachibana tells Higuchi two important things: how to find Aoi's whereabouts and hints of Nitta's involvement in Higuchi's wife's murder.

Tachibana suspects Okihara as a collaborator, believing that the person who murdered Nitta is the same person who killed Higuchi's wife. In the meantime, a 6-year-old child reports that his mother stabbed him.

Higuchi, who now has information on the actual suspect responsible for his wife's death, is attacked and disappears. Ishikawa rushes to the scene only to find that an unexpected person has Higuchi's cell phone.