A town lost in the taiga disappears without a trace, and everyone who tries to find it disappears too. All the Changed to the east of the Ural Mountains suddenly rush to an unknown place, obeying only the call they hear. A stalker who decides to give up his risky profession and return home finds himself in the thick of strange and bloody events. The dream game of a team of role-players suddenly turns into a battle for survival, and in the taiga wilderness a virus is rapidly maturing, capable of destroying all of humanity. Who will be able to unravel this deadly knot?