The story revolves around a top-secret resort for retired U.S. intelligence officers. A group of criminals led by Balzary breach the compound, hellbent on revenge on Robert, forcing the retired officer and his son to save the day.

Weeks after the deadly assault on Fortress Camp, Robert makes a daring rescue to save Sasha, the widow of his old nemesis Balzary. But back in the camp's command bunker, it appears Sasha may have devious plans of her own. As a new attack breaks out, Robert is confronted with a familiar face he thought he'd never see again…

Part 3 of The Fortress trilogy.