Public Security Section 9 is an elite special ops unit that works directly under the control of the Prime Minister. They've been called in to rescue a high-ranking government official from a hostage situation. But something doesn't seem right to Major Motoko Kusanagi. After some investigating, Section 9 uncovers a major espionage plot, and it's up to them to prevent a major international incident.
After being ambushed by Kuze's followers at a false location, Section 9 is alerted to his true location, and his intentions of purchasing nuclear materials from the Russian mafia.The Cabinet Intelligence Service and Gohda are involved behind the scenes.
The entire city of Nagasaki is evacuated and the JSDF moves in after a live nuclear bomb is found planted in the city, presumably by Dejima militants. Section 9 arrives to defuse the bomb and determine its precise origins.
The government declares martial Law in Dejima, believing that the refugees have a nuclear device and plan to use it to gain independence. When the refugees' connection to Kuze is cut off, one shot begins a bloody war.