When a former CIA operative is murdered, Keaton enlists Shepherd to help recover valuable intel that could take down Tal once and for all. But the question remains, can Shepherd be trusted?

Once Shepherd convinces Keaton that Anna Cruz is a mole inside the FBI working for Tal, Keaton decides to keep his enemies close. With a fox in their henhouse, Keaton and the team spy on one of their own, hoping Cruz will lead them to Tal.

Flashbacks to the past reveal the fateful events that led CIA Deputy Director Erica Shepherd to betray her country and the ensuing investigation that put her on a collision course with Will Keaton.

After a major Tal operative escapes CIA custody, Shepherd returns to Langley to help track the fugitive down. Shepherd and Keaton discover the CIA is withholding vital information on Tal, so they spy on the CIA to find out what the agency knows.

When a group of contractors working for the CIA is murdered, Keaton and the team discover the CIA is keeping secrets from the FBI regarding Tal. Shepherd's ex-husband finds out that Hannah has been lying and visiting Shepherd.

Tal's war on the CIA expands to two fronts; Keaton and the CoIntel team must locate the domestic target before Chigorin launches an all-out assault on the unsuspecting innocents; Shepherd convinces Keaton to let her go to Cuba to thwart Tal's attack.