When politician's wife and undercover spy Helen Webb learns that her lover has been murdered, the Black Doves recruit an old friend to help protect her.

With danger drawing closer, Sam takes refuge in the only safe place he knows. Reed issues an ultimatum, and Helen gets one step closer to the truth.

Armed with evidence and bent on vengeance, Helen goes searching for the Clarks. As the conspiracy starts to unravel, she has a deadly decision to make.