This is not just a fantastic interactive story about a fateful turn in the life of a young talented scientist invited to work at the modern scientific and technical center of the Zaslon company. The plot intrigue of the story, lying on the surface, is skillfully complemented by philosophical subtext, raising moral questions, exploring philosophical, technical and scientific issues. The answers to these questions are presented in very ambiguous ways, leaving the reader to decide for himself what is right and what is wrong. The ending of the story is deliberately left open. The problems raised in it are not fully resolved, and the characters are faced face to face with a rather difficult and, at first glance, impossible task.