One tiny change and the future could be history. Not everyone heeds that warning. A powerful and ambitious politician taps into the secrets of time travel and sets out to change his yesterdays and assure his path to the U.S. Presidency. That’s something Max Walker, an elite patrolman in the government’s secret Time Enforcement Commission, is sworn to stop dead. But will Walker himself alter events so that he can undo the decade-ago murder of his wife?