WHAT IF YOUR LIFE HAD AN ’UNDO’ BUTTON? Arlo Knott develops the mysterious ability to reverse his last action. It makes him able to experience anything, to charm any woman and impress any friend. His is a life free of mistakes, a life without regret. But second chances aren’t all they’re cracked up to be. As wonderful as his new life is, a mistake in Arlo’s traumatic childhood still haunts him and the temptation to undo, undo and keep undoing could be too much to resist.