Divison’s secrets are at risk of being revealed to the world when Owen, a Division operative, escapes from a bank robbery and becomes a fugitive. Percy decides to search for Owen himself, which makes Michael suspicious of his motives. Meanwhile, Alex sneaks into Percy’s office to warn Nikita, but she is busted by Thom. In the end, Nikita and Owen go head-to-head until Percy joins them for a tense standoff.

Nikita and Michael temporarily team-up to kill a terrorist who murdered Michael’s family many years ago. When Percy learns this information, he sends Division agents to kill Nikita, who ultimately compromises the mission, leading to Michael’s capture by the terrorist group. Alex is caught going through medical files inside Division so she creates a lie that involves Jaden and almost blows her cover.

Alex’s first assignment is a group mission to kill the Prince of Georgia at a museum gala. After Alex tells Nikita about the order, the two devise a plan to foil the assassination. However, Nikita trusts the wrong person and their plans are foiled, resulting in a stand-off and alerting Division that Nikita is in the building. Percy sends Michael in to kill Nikita.

Owen returns with information on one of Percy’s black boxes. Nikita returns to London with him to retrieve it but notices that Owen is acting strangely. Owen tells Nikita that he wants to release the contents of the black box and when Nikita disagrees, he turns on her. Meanwhile, Percy finds out Nikita is in London and dispenses Michael to kill her. Also, Amanda overhears Jaden arguing with Alex about the escape tunnels so she hooks Alex up to a lie detector to get the truth out of her once and for all.

Michael discovers Cassandra, a woman he once romanced under Division orders, is in danger. Feeling guilty for how things ended, he wants to help her but Nikita suspects there is more to it than easing his conscience. Amanda manipulates Alex into helping her on a mission but Sean gets caught in Amanda's web of lies and begins to doubt Division's true motives.

With Michael out of town, Nikita turns to Owen to help her track down and steal another black box from a Guardian. Unfortunately, she discovers that Owen is working for an unlikely employer that could jeopardize Nikita's whole operation. Amanda realizes Alex received privileged information about Semak and that information could only have come from Percy. Furious that Percy undermined her, Amanda strips him of all his amenities. Back home in Russia, Alex finally makes her move on Semak.

Nikita and Michael try to help Carla remember her past, which holds the key to taking down Division. Carla recounts the night Nikita was arrested and Nikita is stunned at what she learns. Meanwhile, Alex shows up at a Zetrov press conference where Semak is speaking and announces that she’s Alexandra Udinov.. Alex demands a trade – her mother for the empire.

When Nikita worked for Division, she targeted a man named Nicholas Brandt and infiltrated his inner circle. She captured him and he’s been behind bars ever since. However, Percy springs Brant, and his first mission is to capture Nikita for payback. After he has her in his clutches, he tortures her, forcing Nikita to face a side of herself she thought she had long buried. Meanwhile, Percy continues to play mind games with Michael, Alex and Sean, pushing one of them to the brink of death.

When a former undercover Division agent, Markov, is elected President of Uzbekistan, Nikita and her team decide to capture him during his visit to the United States.

Ray (Matt Bushell), a rogue agent, kidnaps his girlfriend Kate (Anna Hopkins), so Ryan dispatches the team to rescue her. Nikita is confused when Michael sends Owen into the field with her instead of going himself. Meanwhile, Sean makes a decision about Alex.

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.

Amanda forces Nikita into a life-threatening situation where she has to choose between saving Michael or saving herself. The team races to find a way to stop Amanda, but with a diminished Division, they might finally be out-gunned.

Nikita reunites with Michael, Birkhoff and Ryan aboard the team’s aircraft command center. Michael refuses to discuss their relationship but tells Nikita she should stay with the group and let them help her clear her name. Ryan realizes Amanda is making doubles of VIPs with The Shop’s help. Nikita discovers that one of the doubles is the Director of the FBI, but doesn’t know how to kill him without exposing herself. Meanwhile, Alex holds Sam at gunpoint and demands he return what he stole from her, but when a gang of thugs attacks them they are forced to work together to escape.

Frustrated that MDK is still active, Nikita decides to end it her way. Leaving Michael and the team behind, Nikita takes Alex on the road to exact revenge. Nikita and Alex capture Mr. Jones and force him to reveal the names of the rest of the members of MDK. Armed with the information, Nikita goes down a dark path that may ultimately cost her her soul. Michael tracks her down and must get her to surrender before the military opens fire and kills her. However, Nikita isn't one to give up on a fight, leading her to make a shocking decision.