After the events of Psycho-Pass 3, Inspector Kei Mikhail Ignatov finds himself involved with an organization named Bifrost. First Inspector Koichi Azusawa coordinates an assault on the Public Safety Bureau tower.

In this sequel to Psycho-Pass TV show, Inspector Tsunemori is sent to a neighboring war-torn nation, where the Sibyl System is being introduced as an experiment, to find Shinya Kogami, her former enforcer who went rogue three years ago.