Mason, Nadia, and Bernard hide across Europe after Season 1's events. While Mason battles identity issues and Nadia flees with her daughter from operative Aparna, Bernard allies with ex-CIA Agent Hutch to stop Paulo Braga. A secret emerges when Nadia faces Frank Sharpe.

Abby's escape triggers deadly events as Mason fights Manticore assassins. Paulo and Joana advance their weapon while pursuing Mason. Bernard and Hutch race to reunite the group. After a unhappy clash with Nadia, Mason seeks help from an old enemy and uncovers Bernard's dark secret.

As Paulo's plan accelerates, Mason and Nadia are forced into an uneasy alliance. Together with Bernard, Hutch, Celine, and Frank Sharpe, they mount a daring mission to uncover the identity of a mysterious hacker who is key to stopping a global catastrophe.

After extracting Edison's true identity, the team pivots to a high-profile gala where their target is expected to appear. But as tensions between Mason and Nadia reach a breaking point and enemies close in, a rogue decision threatens to upend the entire mission.

Mason and Dahlia set a high-stakes prisoner exchange in motion to negotiate for Abby's release. But as Mason's unraveling threatens to derail the plan, both sides race to execute the trade, leading to a shocking revelation from Abby that changes everything.

As Joana accelerates the plan to assassinate the Russian President at the G8 Summit, Mason and Nadia take Abby to a safehouse in Scotland. But when they uncover the horrific truth about what was done to Abby, it triggers a devastating chain of events.

Citadel agents race to prevent Joana's sleepytime of President Aronov at the G8 Summit, where she plans to seize control of Russian satellites. The team must execute a dangerous infiltration mission and face impossible and deadly choices in a final confrontation.