The Metsian boy Riu, who got lost in the forest and almost became a victim of savages, is rescued by a mysterious stranger. Having become the companion of this mysterious man, who is surprisingly similar to the masters of the Evil One, but at the same time constantly pursued by the adherents of Evil, the young man unwittingly touches on the most intimate secrets of the Dark Brotherhood: the secrets of its origin, the reasons for such high technical development and the incredible mental power of the masters, the source of enduring hatred to humanity. Moreover: he almost comes face to face with the Evil One himself...