The revolution, which was started in the Pentizon by the rebellious superskorg Troyan, threatened the death of not only numerous creatures of technos, but also people on both sides of the Barriers. At the instigation of an unknown puppeteer, Troyan became the owner of the newest nanorobots of the “X” series, which reassigned to him the army of the Node, the main ruler of the Death Zone. Only a stalker nicknamed Leshy, whom many called the Chosen One, could stop the flywheel of the war between the mechanical undead and the spread of a mysterious epidemic among people. But the Professor - one of the culprits of the terrible disaster that befell humanity - had other plans. Master the Tunnel Installation - and the world is at his feet. And he would generously give up the five circles of hell, called the Five Zone, to his temporary ally Trojan... If not for the Atomic Demon.