CIA agent and former U.S. Marine war veteran, James Silva, leads a Special Activities Division team code-named Overwatch to raid a Russian FSB safe house in the United States. Under the remote supervision of James Bishop and his team, the mission is to locate and destroy shipments of Caesium before the highly radioactive substance can be weapons. In the ensuing firefight, most of the Russians and Overwatch operative Greg Vickers are killed, but critical intelligence on the Caesium is destroyed. Silva executes the last survivor, a teenager who warns him that he is making a mistake. Sixteen months later, in the Southeast Asian country of Indocarr, police officer Li Noor surrenders himself at the US Embassy to negotiate for passage out of the country in exchange for information. Noor is revealed to the asset of Overwatch agent Alice Kerr and reveals he possesses a disc containing information on the Caesium, and is able to negotiate passage out of the country in exchange for unlocking the disc, which is programmed to self destruct within four hours. Ambassador Dorothy Brady is visited by the country's Deputy Foreign Minister and state intelligence agent Axel, with the two demanding that Noor be handed over as he is wanted for espionage. Meanwhile, Noor fends off an assassination attempt by disguised government agents in the embassy infirmary using his skills as a former member of the elite tactical squad..