You say clouds are white-maned horses? Oh well. One such horse flew over the city, after which half of the population instantly turned into bloodthirsty zombies, attacking everyone for no apparent reason. But here’s the mystery: the other half of the population has not undergone changes, but is now forced to flee from insane killers. What happened? Why did some become fiends of hell, while others did not? What to do with all this now? The answers to these questions will have to be found by the professional shooter and literature lover Nikolai, the martial arts master, the beautiful Velislava, and the funny old man San Sanych.