Psycho-Pass 3: First Inspector

Koichi Azusawa coordinates an assault on the Public Safety Bureau, using Chiyo Obata along with a pair of Pathfinders, Jackdaw and Vixen. Meanwhile, Shirogane returns to Bifrost where he prepares to gamble against Shizuka Homura on the outcome of the assault. Azusawa shuts down the Bureau's headquarters and with Obata frees the latent criminals in the holding cells and arms them so that they can attack the detectives as a diversion. Following the initial attack, Unit One is without its Inspectors, Unit Two is destroyed by the Pathfinders and Unit Three is locked outside the building. Azusawa also takes Arata Shindo hostage. Outside, Ignatov is contacted by Shirogane, who promises to tell him the truth about his brother's death in return for his allegiance. Sugo follows Ignatov to the meeting point where they are both ambushed by a sniper turret. Shinya Kogami and Nobuchika Ginoza arrive and work together with Ignatov to foil the ambush and make their way to Public Safety. Azusawa demands that Governor Komiya resign or everyone in the building will be killed. The Pathfinders capture the bureau chief, Joshu Kasei, to force the issue, but she jumps from the top of the building to her death rather than become a pawn for Azusawa. Meanwhile, Shion Karanomori and Karina Komiya find and release Shindo Arata.

Ignatov and the SAD use a MFA helicopter to attack the drone sniper turret and manage to destroy it, but also set off a series of explosions. Ignatov and Kogami gain entry via the roof where they link up with Kisaragi and Irie, and Shindo updates him on the current situation. Shindo leads Karanomori and Komiya towards the server room and are intercepted by Jackdaw, but they manage to escape with the intervention Ignatov and other detectives including Shinya Kogami. This enables Shindo to escort Komiya and Karanomori to the server room to restore internal communications. Azusawa calls Ignatov and offers a deal to exchange the governor for his wife, but he refuses the deal. Komiya and Karanomori reach the server room, but it is booby trapped with poisonous gas. Karanomori relishes the challenge of beating Azusawa and manages to restore the a third of the system, but is knocked out by the gas. Ignatov, along with Irie and Kisaragi arrive and rescue them. Meanwhile, Shindo rescues En Owanee from a fighting robot and deduces that the gas filling the building's lower floors is harmless so he calls Azusawa's bluff. Public Security decides to use Karina's AI doppelganger Ma-Karina to fake her death, though Ignatov secretly sends Ma-Karina's data to Homura at his request. Meanwhile, Shindo "traces" Azusawa and learns that there is a connection with his father.

Shindo continues "tracing" his past, and remembers that his father made a deal with Bifrost to protect him from the Sibyl System after discovering he is criminally asymptomatic. He also remembers his father showing him the Sibyl System's true form and deduces Azusawa's desire. He realizes that he has gone too deep, but is pulled out of his trace by his lifeline, Ignatov. Azusawa realizes that he may have lost the battle and offers to trade information on the Peacebreaker remnants overseas to the Ministry of Foreign Affairs for free passage. At Bifrost, Shirogane realizes that Karina is not dead, and Homura wins the wager. Kogami kills Jackdaw, and prepares to arrest Azusawa, but Shindo wants to confront him himself. The Pathfinder Vixen reaches Ignatov and Komiya, but Ignatov kills her and uses Ma-Karina to impersonate her and convince Azusawa that Komiya is dead. As Azusawa and Obata prepare to leave, they are confronted by Shindo, who promises to tell Azusawa the secret of the Sibyl System. Azusawa reveals to Shindo that the development of Ma-Karina was part of Bifrost's plan to open up a new exploit in the Sibyl System, and that his ultimate aim is to become part of Sibyl. He also reveals that Bifrost was originally a debugging unit during the early days of the Sibyl System, but its members began abusing their position to take advantage of Sibyl's vulnerabilities. At Bifrost, Homura reveals he used Ma-Karina to counter Shirogane's AI-assisted investments, resulting in Shirogane's loss and elimination. Homura then nominates Sibyl to be the next Congressman, intending to destroy Bifrost once and for all. Sibyl uses its system access to decommission Bifrost and listens to his request to have Akane Tsunemori released. Meanwhile, Shindo takes Azusawa to the Sibyl System's core, where Azusawa requests to join Sibyl. However, Sibyl refuses, pointing out that Azusawa is not criminally asymptomatic and therefore ineligible. This enrages Azusawa, raising his Criminal Coefficient enough for Shindo to knock him out with his Dominator.

Afterwards, Unit One returns to work as usual. Karina explains to the public that the attack on Public Safety was orchestrated by domestic anti-Sibyl terrorists and not immigrants. Yayoi Kunizuka and Karanomori both survive and agree to live together after Karanomori is relieved of her duties as an Enforcer. Shimotsuki is shocked that Homura has been chosen to replace the "deceased" Kasei as the new chief of Public Security, and that Tsunemori will be assigned to her as an Enforcer. Tsunemori is released from confinement and is picked up by Kogami. Shindo and Ignatov mend their strained relationship, and both admit that they are keeping secrets from each other, but promise they will eventually tell each other the truth.

In the film's post credit scene, Tsunemori contacts Shindo and Ignatov, stating she will tell them something.

Yūki Kaji (left) and Yūichi Nakamura (right) voiced Arata Shindo and Kei Ignatov, respectvely

The main cast returned with:

• Yūki Kaji being interested by the mysteries behind the members from Bifrost and the handling of the Sybil System.[11] Shiotani claimed that Kaji's work as Arata Shindo was remarkably good.[12]
• Yūichi Nakamura expressed pressure with his work due to Ignatov possibly betraying his friends. However, he was relieved with the film as he felt Ignatov did not make such change. In regards to his role in the movie, Nakamura stated that before its release, the cast could not watch it due to they only have seen the script and doing recording. However, he looked forward to it.[13]
• Mamoru Miyano expressed pleasure in working in the film, praising the way the narrative was handled.[14]
• Kenyu Horiuchi voices Koichi Azusawa. The staff drew paralelism between Kajil's and Nakamura's characters with Miyano's and Horiuchi's while also highlighting the antagonists as mysetrious.[15]