About the title
A Russian laboratory has produced a new top-secret vaccine capable of treating several strains of so-called combat viruses - man-made pathogens - at once. But one of the lab's employees turns out to be a traitor and tries to sell the formula to neighboring countries. Vlad Artemyev, an officer of Russia's Foreign Intelligence Service, learns of this and begins hunting for the traitor, trying to get ahead of spy networks from other countries.