The Moscow Vector

Contacted by Dr. Valentine Petrenko, a Russian specialist in rare diseases, about a mysterious cluster of deaths in Moscow, American Dr. Fiona Devin becomes the target of the assassins who kill Petrenko, and Covert-One operative Lt. Col. Jon Smith, sent to rescue Devin, finds himself taking on an enigmatic figure armed with an undetectable, unstoppable, and incurable bioweapon.