The novel by Marina Yudenich, a professional psychologist and one of the most popular writers in Russia, is written, like her previous works, in the genre of psychological prose with elements of mysticism. An ordinary, prosperous Moscow court again and again attracts an insane serial killer. A maniac who not only does evil, but seems to be waging a strange war - a war according to mysterious rules known only to him. The killer needs to be stopped, and it probably can be done. But will it be possible to stop the Evil that entered the world with him? Evil, the roots of which lie in the distant past, when something happened that now resonates with horror and pain?..