Former CIA agent Erica Shepherd, now known as one of the most notorious traitors in recent American history. Shepherd is brought out of a federal Supermax prison by FBI Agent Will Keaton to help stop some of the most dangerous acts of espionage threatening the United States today.

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.