Arata Shindou and Mikhail Kei Ignatov, inspectors, have discovered a terrible scheme. A criminal group gaining riches and influence in the shadows is undermining Japan's Sybil System, the ultimate evaluator of human character. Now, Bifrost agent Kouichi Azusawa launches an all-out attack on the Criminal Investigation Department, invading its headquarters and kidnapping Inspector Shindou and everyone else with him. The responsibility of regaining the building and protecting everyone within falls to CID Unit 1 supervisor Shinya Kougami, Chief Mika Shimotsuki, and former unit members Shinya Kougami and Nobuchika Ginoza.