Veteran FBI agent Charles Barker, who isn't afraid to break rules to get the job done, trains new rookie parter Ellis Dove in his pushing-the-envelope style of agenting. But if Dove is having trouble learning the ropes, it could be because he's a little distracted: An FBI Internal Affairs team that suspects Barker may have gone rogue is pressuring Dove to work as a double agent and keep them posted on his mentor.