Michael and the team trace the gun that was used to kill Nate to a mercenary group. To find out who within the group is responsible, Michael approaches the mercenaries as a wealthy executive looking to hire a private army, but Sam and Jesse have to take over when Michael gets roped into running point on a CIA mission involving the agency's newest asset-Fiona.

The CIA needs Fiona to infiltrate the home of an aerospace tycoon who they suspect is selling secrets to terrorists. Fiona poses as a friend of the tycoon's girlfriend, but his security turns out to be more than she bargained for. Fiona and Michael have a back up plan, but first they have to convince the CIA to play by their rules.