In the tense and uncertain years before the Second World War, Jimmy Nessheim, a young Special Agent in the fledgling FBI, is assigned to infiltrate a new pro-Nazi German-American organization known as the Bund which is conspiring to sabotage American efforts against Adolf Hitler. But as he penetrates the heart of the Bund, it becomes clear that something far more sinister is at work - something that seems to lead directly to the White House.