Recounting the chaotic events that occurred in Dallas, Texas on November 22, 1963, the film weaves together the perspectives of a handful of ordinary individuals suddenly thrust into extraordinary circumstances: the young doctors and nurses at Parkland Hospital; Dallas chief of the Secret Service; an unwitting cameraman who captured what became the most watched and examined film in history; the FBI agents who nearly had the gunman within their grasp; the brother of Lee Harvey Oswald, left to deal with his shattered family; and JFKs security team, witnesses to both the presidents death and Vice President Lyndon Johnsons rise to power over a nation whose innocence was forever altered.