A physicist who witnessed an anomalous phenomenon in the taiga near Khabarovsk and is trying to find his missing colleagues... A retired KGB officer unraveling the mystery of a medieval manuscript that has a bloody trail behind it... A Russian intelligence officer who suspects his American colleague of a double game and accidentally discovers he has a mysterious plate-key in his house... It’s unlikely that any of the listed heroes could imagine that their investigation would lead to a clash with representatives of the Conjugate World, the world of “immortals.” And now their task is to save earthly civilization from imminent disaster...