The distant future. Humanity is divided into those who live in Clusters - huge tower cities, and savages who hunt in the wastelands. Mortal danger looms over the Djerba Cluster. And only Valtor Prey and his friends Ramon know how to destroy the sinister machinations of Kir Dungaev, the “gray eminence” of the Triangle of Clusters, who decided to take the Cluster into his hands. But trouble doesn’t come alone. Numerous tribes of Dzhangurs leading a primitive lifestyle are being removed from their homes. And all because Bithant, where they previously lived peacefully, was invaded by the eyeless monsters of the Aivura, which very soon become a threat to the entire Triangle...