Russian physicist Yegor Ermakov, doing research in the field of high-frequency radiation, did not even imagine that one day he would find himself as a prisoner on an underground alien base from a distant galaxy. An irresistible desire to escape from captivity makes him challenge representatives of a powerful civilization. In a mortal battle with invulnerable humanoids, he manages not only to survive and return to the usual three-dimensional world, but also to take possession of the Mind Capsule with universal knowledge.