A nineteenth century French priest discovers something in his mountain village at the foot of The Pyrenees which enables him to amass and spend a fortune of millions of pounds. The tale seems to begin with buried treasure and then turns into an unprecedented historical detective story a modern Grail quest leading back through cryptically coded parchments, secret societies, the Knights Templar, the Cathar heretics of the twelfth and thirteenth centuries and a dynasty of obscure French kings deposed more than 1,300 years ago.