This installment in the Call of Duty series features a fresh dynamic where players are on the side of a crippled nation fighting not for freedom, or liberty, but simply to survive. 10 years after a devastating mass event, the nation's borders and the balance of global power have been permanently changed. As what's left of the nation's Special Operations forces, a mysterious group known only as "Ghosts" leads the fight back against a newly emerged, technologically-superior global power.