A thriller which begins when three women are murdered with obsidian mirrors. Mysterious notes are found next to the bodies, so the police call in Yvette Garcin, a specialist with the OMR- a French government agency tasked with monitoring cults and religious movements.
Her investigation uncovers a string of apparently unconnected elements: a 1967 murder,a group of 7th century Yemeni priestesses, the Holy Grail, and the Priory of Sion. None of this brings her any closer to solving the murders. Just as she thinks she's hit a wall, something happens which sets her on the trail of an international conspiracy to bring about the apocalypse. And it may be too late to stop it.