You will get to know when you play.Okay let me tell a little,The Russians have attacked U.S.A. and you are an undercover special FBI agent who with some other agents was sent to the warzone.When flying your plane got shot by a Russian SAM.You luckily survived and fell in a ghastly location where one of your friends resides.Find the rest in the mission,when completed don't forget to download the next part it will be uploaded soon.Thanx friends!