Michael's deal with the CIA sends him to the Dominican Republic to infiltrate a terrorist organization headed by an old contact. Sam, Fiona, and Jesse try to move on with their lives, but are drawn back in when someone starts asking questions about Michael's whereabouts. Maddie tries to get custody of her grandson.
Michael returns to Miami in order to preserve his cover, but Strong puts a damper on his homecoming by forbidding Michael from contacting his friends.
Sam and Jesse travel to the Dominican Republic to help Michael with a high-stakes trade. Elsewhere, Fiona intervenes when a bookie tries to extort Madeline.
As Michael attempts to learn more about Burke's underground network, they are sent to break a prisoner out of a Russian black site in Cuba. In order to help, Fiona and Madeline must frame a corrupt Russian bureaucrat for treason.
Michael meets a former Russian operative who now works as part of Burke’s mysterious organization. In order to get out of Cuba, they’ll have to outwit a bloodthirsty counterintelligence expert who’s locking down the island. Strong convinces Fiona to help Michael’s mission by making her an offer she can’t refuse.
Michael and Fiona pose as hackers at a malicious programming syndicate in order to steal information for Sonya. But Michael’s life gets complicated when working with Fiona again brings back painful memories. Meanwhile, Sam and Jesse help Barry track down a former girlfriend in exchange for falsified documents.
Michael finally meets with the head of the organization he’s been assigned to dismantle, but things get dicey when the leader drugs him at gunpoint in order to learn his deepest secrets. In danger of exposing his cover, Michael soon realizes that in order to protect his future... he'll have to face his past first.
Michael goes after a drug smuggler at the bidding of the organization he's trying to infiltrate. Elsewhere, Fiona, Jesse and Strong visit a mental hospital in a search for more information about James.
The team look for an antidote at the manufacturer's lab in order to save a poisoned Middle Eastern diplomat. Elsewhere, Madeline takes action when she suspects she's being followed.
When Michael discovers an old friend digging up secrets that could expose his cover, he must decide just how far he will go to protect the mission. Meanwhile, Sam and Jesse are thrust in the middle of a street war involving a decade-old murder after Fiona’s boyfriend is targeted by a coldblooded gang member.
As Michael becomes ever more conflicted with his mission, he travels to Mexico with Sonya in order to help James with an important job. Anxious to finish the operation, Strong hires freelance mercenaries to extract James on site... but brings along an unexpected guest.
Michael must expose his identity to James and Sonya. Meanwhile, Fiona, Sam and Jesse form a plan to retrieve Michael.
Michael must regain the trust of those closest to him in order to finish what he started.