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.

Michael must work with an enemy to keep chemical weapons out of the wrong hands.