While meeting with a confidential informant, Mary Grant's husband, Joe, an FBI agent, is killed on a remote, dusty road outside of Austin, Texas. The official report places blame on Joe's shoulders, but the story just doesn't add up and Mary prods the FBI to investigate. There are just too many questions. Meanwhile, Ian Prince, founder of ONE technology, the world's largest Internet company, has his own concerns about the FBI looking into Joe Grant's death. Prince's newest invention, the Titan supercomputer, is set to launch, and Mary's quest for the truth could cause him trouble. When Mary is stonewalled by the FBI, she takes matters into her own hands. With the help of her daughter, Jessie, a brilliant hacker, she takes over her husband's investigation, putting herself and her entire family in the crosshairs of one of the most powerful men in America, as well the newest and most terrifying surveillance system ever created.