Welcome to the Earthscraper - an endless dungeon with hundreds of thousands of floors inhabited by mutants, bandits, crazy fanatics, deadly anomalies and the Party - the power that brings order to this madness. Ivan Volkov is a simple serviceman on the 340th floor. He goes on patrols, protects the peace of civilians, shoots mutants and stops various violations on the floor. But one day his boss sends Volkov to another floor to get a set of tools. A seemingly simple business turns into a series of dangerous situations that force an ordinary person to fight for his life with the nightmarish creatures of the Earthscraper.