The technology of implanting computer microchips into the brain has brought civilization to a new level of development. A scientific development, initially intended for the treatment of pathologies of the central nervous system, quickly turned into a “neurophone” - a fashionable gadget that opens up to its owners all the delights of virtual reality. Petr Frolov, a security officer at a neurophone manufacturer, accidentally gains access to secret data: the company has complete control over the minds of users, and the technology itself is of unearthly origin. What goals do the creators of neurophones pursue? This question fades into the background: Frolov has been declared an outlaw, a real hunt begins for him, and killing him is the first priority for any gadget carrier.