Evil does not always come into the world in the guise of monsters invented by science fiction writers. It can also come in the form of a fragile little woman, whose gaze involuntarily strikes you with its coldness. “Strong people never grow old,” Hilda, the mentor and jailer of her soul, tells the heroine. And in order to break the terrible chain - from the Valkyries of Valhalla to the blue-eyed Valkyries of the Third Reich - those looking into the Black Mirror will have to remain young for a long time and retain the strength to fight.

Like a magnet, attracting to themselves all kinds of troubles, misfortunes and deaths, the hero of the novel, Igor Biryukov, does not even realize that he is just a grain of sand that accidentally fell into a monstrous whirlwind, and he is not at all the main character of that terrible mystery that he sees in the black mirror.