The damn cemetery in the vast expanses of the Siberian taiga, near which even the indigenous Evenks do not hunt, terrifies everyone who has ever observed mysterious blue flashes in the middle of the night taiga. Rumors about a mysterious creature in the waters of the Lower Tunguska are supported by real disappearances of people. The investigation into the case of a missing woman leads private detective Andrei Serov straight to this ominous place. A tangle of events captures him, and the detective is horrified to discover something that can change the idea of human existence...