The events of the third book unfold a few years after those described in the two previous ones. The inhabitants of the Sphere have relocated to Earth, and now the Sphere belongs to a huge terrestrial corporation that, in order to preserve manufacturing secrets, has placed in it its research laboratories and pilot production. One of the experiments conducted by the corporation’s researchers inside the Sphere goes out of control. The lives of everyone inside the Sphere are at risk. With a rescue mission, the heroes arrive—characters familiar from the first two books of the trilogy. However, the representatives of the corporation are interested primarily not in saving people, but in maintaining secrecy, since the secret work carried out in the Sphere was aimed at creating a new super-weapon capable of self-reproduction and of analyzing its own actions. The degree of intelligence of these combat machines turns out to be far higher than their creators expected. What can a “pure” mind do when it isn’t burdened with ethical and moral problems—when no one taught it “what is good and what is bad”?