What Anastasia Kamenskaya faces this time is more like a scientist-fantast story: in one of Moscow’s districts, the level of crime suddenly rises sharply. Incredible, yet a device developed in one of the local research institutes stimulates aggression. And it seems someone wants to use it to manipulate people. It persistently moves toward its goal, using intricate inventiveness to destroy those who stand in its way. But still, it isn’t a demon of evil—only a human being, and humans are prone to make mistakes. To make this man err, Anastasia will have to cross the narrow bridge between life and death…