A temporal anomaly - people suddenly disappearing without a trace. Are the mysterious Black Gems behind it? After the amateur pilot, Wolf, found such a Gem in the chthonic chamber underneath the pyramid of Cheops, he and his companion Linda are again and again confronted with them during their journeys in Egypt. At Mount Untersberg, near Salzburg, Austria, people disappear as well. During their research into the mysterious phenomenon Wolf and Linda make an unbelievable discovery. When their investigation expands to the nearby Mount Obersalzberg, the former residential hideaway of the NS-leaders, Wolf is in severe jeopardy. Their investigation will even send them with a Cessna to Fuerteventura, where under commitment of their life they discover an old secret in the Villa Winter, a country house from pre-war times. Over and over again the Black Gems have an unbelievable part in the act. But there are others, who know about the Dominion of the Gems and who are willing to commit anything for getting hold of them ... This gripping and enthralling novel is predominantly based on true events