What is the main conflict in Deep Lie: A Novel by Stuart Woods?

Deep Lie by Stuart Woods is an espionage thriller about a woman named Katherine Rule and her quest to prove that her intuition is right. Rule believes that the mysterious Majorov is up to something within the Soviet Union, but she is stopped at every turn by her own agency. Is it just Rule's ex husband trying to make her look like a fool, or is there something else going on here? Katherine Rule will do whatever it takes to find out the truth.