On November 22, 1963, three shots rang out in Dallas, President Kennedy died, and the world changed. Unless... In 2011, Jake Epping, an English teacher from Lisbon Falls, Maine, sets out on an insane — and insanely possible — mission to prevent the Kennedy assassination. Leaving behind a world of computers and mobile phones, he goes back to a time of big American cars and diners, of Lindy Hopping, the sound of Elvis, and the taste of root beer. In this haunting world, Jake falls in love with Sadie, a beautiful high school librarian. And, as the ominous date of 11/22/63 approaches, he encounters a troubled loner named Lee Harvey Oswald...