In a secret laboratory, nanodevices are being developed that would have intelligence and the ability to act. These are the so-called nanovites. Suddenly, a powerful explosion occurs at the institute and the substance with nanovites is sprayed into the surrounding space. And the laboratory is located in the city... And it began... And it turned out that nanovites are capable of penetrating inside a person, infecting his body, changing his psyche and... subjugating a person to himself, making him a zombie, so that with his hands he can fight other people and remake the world for himself. Nanovites exist not as individual beings, but as a Swarm - a collective intelligent formation. This is the power of the Swarm: you can destroy individual individuals, but as a whole the Swarm is indestructible. The threat hangs over the entire world. There is no place for people in it - this is what Roy decided, a new race of living beings created by the hands of man and hostile to him. This means that people need to be able to unite, survive and fight the enemy. Everyone, man and woman, child and old man, is obliged to become fighters. As in the old prehistoric times, humanity, in order to survive and reclaim the Earth, must become a race of warriors, hunters and heroes...