A pair of federal agents arrives in a small town to check the work of the A-Sintez factory, which local residents blame for the death of birds and the aggressive behavior of animals that exterminate each other. A scientist hired by A-synthesis creates a vaccine against a virus that appeared at the factory and infected the workers. But the virus penetrates the city, changing the perceptions of those infected, causing them to see people who took the vaccine as monsters. The neighbor does not trust the neighbor and is afraid of him. The sister thinks her brother is a monster. Even among the federal agents there is discord because one of them took the vaccine and the other did not. In addition, animals begin to hunt for healed people...