A paranoid mathematician enlists Michael's help to stop the vice president of a defense firm from selling company secrets; Michael tracks down a new contact in the intelligence community.

Michael convinces an abusive stepfather of a young boy to leave town by telling him he is the target of an assassination plot. Elsewhere, Strickler makes a promise to Michael that he will help him get back into the intelligence community if they can work together.

Barry enlists Michael's help in tracking down his money-laundering client list, which has been stolen by a vicious thief. Michael goes after the thief, only to find that there's a lot more to the situation than he realized. Fiona tries to be supportive of Michael's efforts to reconnect with the intelligence community, but she and Michael find that their differences on the subject may not be reconcilable.

A dangerous man from Fiona's past resurfaces in Miami after years of hiding, with deadly intentions. Teaming up with Fiona's ruthless brother, Michael will do whatever it takes to save her... even if that means crossing a few lines.