Relegated to the cold case department, veteran police officer Senju Hidaka gets a diligent new colleague; they receive an email from an old suspect.

The Okura crew gets a tip that the 2013 death of a bullied high school student 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 ago; 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.