PSYCHO-PASS Inspector Shinya Kogami manga volume 6 features story by Midori Gotu and art by Natsuo Sai.

The explosive conclusion! As Division 3 races to try to save the life of Professor Toshi, they find that the trauma unit within the Special Sector has become a deadly trap. But in this high-tech underground complex, it’s a hidden cache of a very obsolete information storage format—handwritten letters—that may provide the last clue that must be understood by Inspector Kogami…before the elders behind this hidden kingdom of guilt decide to carry out their final act of atonement!