In the eternal city of Negasymiy, where improved people lived, a crime was committed—and the killer turned out to be a "tolerantoid," someone who, according to the birth map, couldn’t have done it. The investigation was led by Kir. He learned that the dead man was a natural person—whose kind was considered long extinct. After skipping the hymn of bliss, Kir together with Milena (a scavenger) left the city-incubator and headed into the wasteland. The assignment was supposed to be easy, as Kir believed—but a combat drone, one that had existed since the times of humans, attached itself to them. Why did the presence of a natural person become dangerous for the eternal city? That was only one of the many questions Kir asked himself as he died in the wasteland—but…