A 21st-century Australian linguist, a 19th-century clairvoyant, and a 13th-century priestess of an ancient Cathar faith. Despite the time, distance and cultures that separate them, these women have several things in common. They belong to an ancient bloodline of Grail kings, protected by a Sion knight named Albray, and they are each compelled to visit an ancient mountain in the Sinai. This mountain contains the keys which may unlock a gateway to a dimension of light and the Gene of Isis.