After you completely all mission of game "Call of duty: Modern warfare 3." Suddenly, you was received the message from the game that have "extra stories".

You clicked on the game and immediately you had been covering by light of your PC. When you wake up back then you sawed you was inside the game while surrounded you is ruined building was collapsed by the bomb, missile and explosives from gunfire. Now, you've become a support character in this game and your story was started.