"When compromising pictures of the Prince are published in a French tabloid, Broadhurst, the Palace's head of security is drawn into the murky world of fundamentalist fever, brutal revenge and sinister international conspiracy.

Across the Channel, Marchal, a widowed detective on the verge of retirement is trying to investigate a series of suspicious deaths, but being thwarted at every turn.

Tying the two conspiracies together is the enigmatic Sator Square - an ancient code with a deadly new resonance."