Inspectors Arata Shindou and Mikhail Kei Ignatov have exposed a perilous conspiracy. The Sybil System, Japan's ultimate arbiter of human character, is being sabotaged by a criminal syndicate that is accumulating wealth and power in the shadows. Now, Bifrost agent Kouichi Azusawa launches a direct assault on the Criminal Investigation Department (CID) by seizing its headquarters and holding Inspector Shindou and everyone else hostage. CID Unit 01 supervisor, along with Chief Mika Shimotsuki and former unit members Shinya Kougami and Nobuchika Ginoza, faces the task of retaking the building and saving everyone inside. Alongside the hostage crisis and Azusawa's demands for Tokyo governor Karina Komiya's resignation, a sinister plot is brewing in the background—a secret plan that will force Inspector Shindou to confront not only Azusawa but also his own past. These events gradually bring him closer to uncovering the mystery that has eluded him and his best friend, Ignatov, for many years.