Fi and Sam ask Michael to take a break and let go of the past now that the people who burned him have been brought to justice, but he soon decides to help one of Nate's friends who is being harassed by a loan shark.
While Michael works with Max to intercept some files on a stolen tablet computer, Barry asks the gang to help his brother, who is having problems with a hacker.
Michael volunteers to help the CIA find Max's killer, even though he is the prime suspect. At the same time, he helps out a former Army sniper who wants revenge on the people who nearly beat his sister to death.
Michael plays a heroin dealer from his past against Serbian mobsters so that he can help the agency retrieve a stolen predator drone. However, his plan threatens to put Sam in serious danger.
The gang takes on a militia group so that Michael can return a boy to his mother, while also trying to get answers out of the man hired as Michael's impostor.
Michael goes on a CIA mission to stop a team of mercenaries in the Bahamas, while Fi is forced to turn to a shady arms dealer from her past to get information for Michael.
While Michael and Sam interrogate the war criminal who made the bomb that was supposed to kill him, Fi and Jesse help a man get revenge on his former business partner who betrayed him.
Jesse asks Michael to sabotage a team of corporate spies, not knowing that they are planning a hostage situation. Meanwhile, Sam and Fi turn to an old "friend" to help gather information about who framed Michael and killed Max.
While Sam and Jesse get some help to get to Tavian, the assassin who framed Michael, Michael and Fi pose as a married couple for a CIA extraction assignment.
Anson forces Michael to kidnap a computer hacker, Oswald, to find a virus that he created that can wipe the records of a person undetected. But Anson isn't the only one after the virus.
While Sam and Fi do surveillance to find Anson's secret hideout, Michael poses as a gun dealer to trap the gang leader who killed one of his childhood friends and get him arrested.
While Sam and Jesse try to save a weapons maker held against his will to build a missile for an African warlord, Michael and Fi discover that Madeline's new boyfriend actually working for Anson.
Fi and Jesse are sent to the Caribbean to transfer Anson's money to a new account. Meanwhile, Michael and Anson put aside their differences to help an old friend of Sam's, who's being targeted by a Russian spy.
When Anson demands that Michael burn the CIA team he's working with, Fi decides she's had enough and takes a drastic step to settle Michael's debt to Anson once and for all.
