When Sherlock and Kitty investigate the murder of a small postal store's owner, they discover a connection to the illegal diamond trade.
The Machine malfunctions during a reboot and supplies Finch and Root with the numbers of dozens of people not involved in any crimes; Finch and Root are locked out of the Machine as it identifies them as threats.
Back at the farm, Owen teaches the recruits a lesson on the necessity of betrayal. Meanwhile in the hostage situation, Alex is forced to team up with Miranda to save the hostages.
The recruits are schooled in the art of seduction, which Alex sees as a perfect opportunity to get closer to Owen.
Alex tries to convince Owen that a traitor is among them; the recruits are tasked with getting an asset out of Germany, but their target has a death wish.