Neal Caffrey (Matthew Bomer) is a handsome and charming criminal master. Four years ago, he was sent to prison by Peter Burke (Tim DeKay), the nemesis of the FBI, for a counterfeit national debt case. Because of the sudden departure of his beloved Kate (Alexandra Daddario), Neal resolutely chose to escape from prison on the eve of his release. Peter arrested Neal on the same day, and Neal's sentence was added for another four years. For freedom and to find Kate as soon as possible, Neal successfully used his advantage as a criminal master to become a special consultant for the FBI, and became a partner of his nemesis Peter. The two of them combined to repeatedly solve strange cases. Because Neal was wearing GPS shackles, his movements were restricted, so he secretly asked his old partner Mozzie (Willie Garson) to help him find Kate's whereabouts. The confusing truth slowly unfolded, and everything was full of conspiracy.