The series follows ex-CIA spy-turned-traitor Erica Shepherd (Jennifer Carpenter) who is serving a life term in a Supermax prison, when FBI Agent Will Keaton (Morris Chestnut) is forced to turn to her to help him find a criminal.
In this fast-paced, spy-hunting thriller, Erica Shepherd (Jennifer Carpenter) is a brilliant former CIA operative, now known as the most notorious traitor in American history serving life in a Supermax prison. Against every fiber of his being but with nowhere else to turn, FBI Agent Will Keaton (Morris Chestnut) enlists Shepherd to help track down a fiercely dangerous and elusive criminal she knows all too well. For Keaton, it’s not easy to trust the woman who cost him so much. While Shepherd and Keaton have different motivations for bringing the enemy to justice, they both know that to catch a spy… they must think like one.