during a covert operation to recover shipments of dangerous chemical gas headed for Urzikstan, CIA SAC/SOG Officer “Alex” is intercepted by unknown hostiles who kill the Marine Raiders accompanying him, and escape with the gas. Alex's handler, Station Chief Kate Laswell, requests the assistance of SAS Captain John Price in recovering the chemicals and de-escalating the situation with Russia. Twenty-four hours later, a group of suicide bombers, affiliated with the terrorist organization Al-Qatala, attack Piccadilly Circus in London. SAS Sergeant Kyle Garrick is dispatched to contain the situation with the assistance of Price and local police forces. Afterwards, Alex is sent to Urzikstan to meet up with rebel leader Farah Karim, who agrees to join forces in tracking down the chemicals, in exchange for his aid in overthrowing Russian forces led by General Roman Barkov.
