Unfairly convicted by the tribunal, the Warrior of the Wind, an officer of the air fleet of the Russian Empire, Yegor Smoroda, is faced with a choice: rot in hard labor or join the members of the mysterious Institute of Applied Exophysics, who, with the help of incredible weapons, cleanse the city of vampires, demons, werewolves and other aggressive undead. However, after Smoroda joins the underground organization of “ghost hunters,” it turns out that the stakes in this game are much higher than he initially thought. However, the escaped convict has nothing to lose.