Percy has his Guardians hold the members of Oversight hostage until Amanda agrees to his demands. If she doesn't, the Guardians will shoot all the members of Oversight and release a deadly gas inside Division that will instantly kill everyone, including Amanda. Nikita is torn between letting the enemy fall and saving the innocent lives inside Division. Meanwhile, Sean is frantic to save his mother from Percy's clutches and turns to Nikita, Michael and Alex for help.

Nikita and Owen face off against a rogue “cleaner” named Liam, while Michael takes a new position at Division. Michael and Nikita’s relationship becomes strained as he watches her work with Owen.

Amanda holds Alex hostage and tells Nikita she will release Alex in exchange for Ari. Michael assigns Nikita and Sean to handle the exchange of prisoners, but Ryan adds Owen to the team at the last minute, which makes Michael suspicious. While in captivity, Alex befriends a fellow prisoner named Larissa and vows to break them both out of the jail, which ultimately conflicts with Nikita’s plan, forcing Alex to choose between Nikita and her promise to Larissa.