Ireland, AD 671. The Great Fair of Bealtain is almost upon the fortress of Cashel, and a line of painted wagons carries entertainers to the occasion. But preparations take a deathly turn when one carriage is set alight, and two corpses are found poisoned within. As Sister Fidelma and her companion, Eadulf, investigate, they are plunged into the menacing marshlands of Osraige - where the bloody origin of the Abbey of Cainnech wreaks revenge.What is the symbolism of the Golden Stone, and who are the members of the Fellowship of the Raven? Fidelma and Eadulf must face untold danger before they can untangle the evil that strikes at the very heart of the kingdom. Praise for the widely acclaimed Sister Fidelma mysteries: 'The background detail is brilliantly defined...wonderfully evocative' The Times. 'Tremayne's super-sleuth is a vibrant creation, a woman of wit and courage who would stand out in any era, but brings a special sparkle to the wild beauty of medieval Ireland' Morgan Llywelyn