The second volume of a gothic thriller whodunnit series set in the Age of the Saints, following on from volume 1 The Ogham Sacrifice. The mystery of murdered monks deepens for the druid Gwynlan, murders perpetrated because of their involvement with a venerated druid manuscript indicating the location of the hidden Treasures of the Britons – the Cauldron of Rebirth and the Spear of Lugh. The Church’s brutal agents, the Holy Vengeance, are intent on usurping the druids’ secrets and using them to undermine the old Celtic religion. They are on Gwynlan’s trail as his investigation leads him from Armorica across the sea to Britain. There, Gwynlan comes under the protection of the enigmatic hero, Arthur. But close to the mighty stones of the Giant’s Dance (Stonehenge), Gwynlan faces mortal danger. Will he and his companions reach the druids’ centre of religion on the sacred isle of Môn (Anglesey)?
The Holy Vengeance, the church's brutal agents, are trying to undermine the pagans by stealing their secrets. Meanwhile the last Druid Gwynlan continues to investigate the murder of monks which seems related to their reading an old Celtic text that just might hold the secret to an old Briton treasure.