A handsome young New York professor comes to Phoenix to research his new book. But when he's brutally murdered, police connect him to one of the world's most deadly drug cartels. This shouldn't be a case for historian-turned-deputy David Mapstone - except the victim has been dating David's sister-in-law Robin and now she's a target, too. David's wife Lindsey is in Washington with an elite anti-cyber terror unit and she makes one demand of him: protect Robin. This won't be an easy job with the ci