When George wakes up one day and finds himself reliving a day from months ago, he thinks he's lost his mind. All of his recent milestones have been undone, including his success at work and his marriage to the love of his life. Worst of all, he seems to be the only one who has noticed what's happened.
That is, until he meets Archie, who recruits George for the Lazarus Project - a secret organisation that has harnessed the ability to turn back time every time the world is at threat of extinction. Like George, those who work at Lazarus are the few people on earth with the ability to remember the events that are undone when time goes back.