June 1940. Veronica Grace has just graduated from college; she and her mother, Violet, are looking for a fresh start in sunny Los Angeles. But their bright beginning quickly turns stormy when Veronica realizes her new boss is one of the area's most vicious Nazi propagandists. Overnight, Veronica is exposed to the dark underbelly of her new home, where German Nazis are recruiting Americans for their devastating campaign. After the FBI dismisses the Graces' concerns, Veronica and Violet decide to call on an old friend, who introduces them to L.A.'s anti-Nazi spymaster. But as the news of Pearl Harbor ripples through the United States, and President Roosevelt declares war, the Grace women realize that the plots they're investigating are far more sinister than they feared-and even a single misstep could cost them everything.