The Betrayal (en Inglés) - Stephen Myler

Matt goes to the Ukraine with a two Special Branch officers to interview a captured Russian officer who claims to be CIA. Kateryna Bondar helps Matt navigate the dangerous world of KGB where defectors or infiltrators can be the same thing? However the case leads to her death at the hands of her own masters. Matt is devastated, but swears revenge for her. Is the turncoat really CIA undercover or a very dangerous intelligence operative deceiving and creating a narrative to fool the enemies of the state?