Almost half a century has passed since the beginning of the Last World War .. Almost the entire population of the planet died on the first day. But a small handful of people managed to survive and hide underground: in subway tunnels, mines and many other objects that somehow could protect from the harsh post-nuclear world. In the largest underground facilities, such as the Moscow and St. Petersburg subways, people managed not only to escape, but also to continue their existence. The stations became dwarf states with their own power and laws. Some were organized into whole conglomerates and confederations, while others constantly fought with each other for territory and resources. But this was not the only problem of the inhabitants of the subway, radiation and countless crowds of mutants on the surface, who never intended to get into the subway. The defense was conducted on all fronts, and it seemed that the inhabitants lost all hope for a bright future, because as they believed, there was no one else in the world except them. But that was a mistake.... There is life somewhere else....