The fatal events and changes that would later be called the Circular Invasion have not yet occurred in the Russian Zone. The “third force” has not yet declared open war. A total catastrophe did not happen, but the processes leading to it began. In the dark shadows, stalkers who are sincerely concerned about the fate of humanity are waiting in the wings. Suddenly, someone or something, for an unknown purpose, performs a "SPOT EXTRACTION." The best of the best are disappearing. The most powerful, advanced and capable of the people involved in the Visitation Zones...