People themselves give birth to monsters that devour them. It has always been like this, and it happened this time too. Strictly classified experiments with nanovites (nanodevices with intelligence and the ability to act) ended disastrously. A powerful explosion in the laboratory - and the substance with nanovites bursts out. And the whole city turned into hell. Nanovites do not exist on their own, but in the form of a Swarm - a collective intelligent formation. This is the power of the Swarm: you can destroy individual individuals, but as a whole the Swarm cannot be destroyed. A threat looms over the entire world. There is no place for people in it - that’s what Roy decided. He makes zombies out of people and remakes the world with their hands.