On the planet-prison of Kali-Yuga, prisoners, as payment for sins, are forced to clear the mountains of garbage left by human civilization for five years. The working conditions, costumes, the most difficult tasks are assigned to special machine guns - everything seems to be in order. Until two and a half years later, a mysterious murder takes place, behind which, as it seems to the criminals, is none other than the main AI - the Computer that runs the prison. Panic is slowly growing. Society is divided into dissatisfied and those who do not care. But the latter is becoming less and less: they go into the ranks of the former.