Continuing his adventures in The Secret of the Cathars, Philip Sinclair returns to the Languedoc, after a week away, to find that his fiancée, the beautiful archaeologist, Jackie Blontard, has gone missing. His desperate search to discover her whereabouts leads him to put his own life in danger. However that is only the beginning.
When the two of them are finally reunited, as a result of his search, they are plunged even deeper into a maelstrom of conflicting events where their footsteps are again dogged by the agents of the mysterious organisation in Paris and La Force Marseillaise. The eliminator from the Catholic Church is also following them closely.
Finally they discover what is really at the root of the mystery of the fabulous wealth discovered by the parish priest of Rennes-le-Chateau and the legacy which the Knights Templar have ensured was hidden from the world until now.