Jake Epping discovers that the storeroom in the local diner is a gateway to 1958. No matter how long he spends in 1958, only a minute passes in his own time. Leaving behind the world of iPods and mobile phones for the days of Elvis, big American cars and lindy-hopping, Jake – after making a few minor changes in the past for the welfare of his friends of today – sets out on an insane mission – to prevent the assassination of John F. Kennedy. But does the past want to be changed? And who are the mysterious and deranged Green Card men who always hang about the 1958 exit?