OKURA-Cold Case Investigation

Relegated to the cold case department, veteran cop Senju Hidaka gets a diligent new colleague. They soon receive an email from an old suspect.

When the Okura crew gets a tip that the 2013 death of a bullied high schooler was a murder, Yoshioka reveals he was the student's classmate.

Senju tells Fuwa the next case he has fabricated evidence for: a bombing from 11 years earlier. Inori says her husband was killed in the incident.

Without looping in Senju, Fuwa secretly sends information to the police about the murder of a high-class hostess from two years earlier.

After Niiyama describes what happened the day Mika was murdered, Senju resolves to fabricate the evidence needed to implicate the true culprit.

Senju sends an anonymous email to the Okura team containing information about the assassination of the deputy prime minister from 11 years earlier.

Senju and the Okura crew learn that Kase’s fate is disturbingly similar to a tragedy that befell several police officers 10 years earlier.

After Senju and the others ponder the strange file they unlocked, the Okura team begins reexamining the cases of the slain police officers.

The true perpetrator of the murders admits to the crimes and reveals they were committed under the directive of a secret division within the police.

Oze, the new chief of the first investigation division, visits the Okura team and asks the members for their cooperation in solving Kase's murder.