Mason Kane of spy organization Citadel crosses a new organization, Manticore, leading to a bad accident. Eight years later, Mason is living quietly as Kyle Conroy, with no memory of his past, until an old colleague asks for his help.
Kyle and Bernard journey to New York City to steal the Citadel X Case from Manticore Headquarters before it's too late. Later, Kyle learns that a figure from his past is still alive and he risks everything to find them.
After the shocking revelation of Abby's former identity, the past entanglements between Mason, Nadia and Celeste, and a horrific decision that reverberates still today.
Nadia, Kyle and Carter are forced to work together to escape from Manticore and protect the X Case, but suspicion of one of our heroes reaches a boiling point, leading to an explosive reckoning.
In the epic conclusion to the season, with one of their own being held hostage by Manticore, Kyle, Nadia and Carter risk everything to save them and thwart Manticore's plans to acquire nuclear weapons.
