Modern Warfare 3 is the third and final game, I think, in the series and let me tell you, it is the best of the three!
The game continues the story of Price and Soap trying to find and end Makarov’s life. It starts with a cinematic intro summarizing what has happened in MW2. Then it begins Call of Duty style. You take control Yuri, an ex-spetsnaz who hates Makarov more than Price and Soap combined. Why? Play the game to find out. Soap is badly injured , from MW2 ending, so you and Price and other fellows must protect him while a doctor patches him up. Lots and lots of enemy soldiers come at you and I think you know what might happen next… :D