In Virginia, a rancher discovers dead bodies on his farm and is then killed by assailants.
The attackers use special explosives to break into an NSA bunker beneath the horse farm.
Together, they rob an 18-wheeler secretly hauling guns and equipment to the Department of Homeland Security under the guise of a cheese truck.
They end up hijacking a tank, and Stone helps Steele infiltrate the Capitol building. Deckert and Cobb abduct Sanford while he is making the State of the Union Address. Jackson arrives with a car, and Stone uses it to infiltrate the train.
Stone infiltrates Deckert's troops aboard the USS Independence and discovers Gibbons is not dead, but being held prisoner. He learns that Deckert is planning a coup against President Sanford.
Stone makes contact with Steele and shows him the plans.
Stone meets up with Gibbons' contact, Mayweather, to get information.
Stone goes to her safe house but is framed for the murder of 4-Star General Jack Pettibone; Mayweather is revealed to be involved.
Stone is instructed to recover a hard drive from the NSA bunker, and he manages to escape Agent Steele at the same time.
Gibbons is attacked in his house and apparently killed, with Deckert and Sergeant Cobb covering up the plot.
The story is covered up, and Deckert is buried and branded as a hero.