Ireland AD 671. The Great Fair of Bealtain is almost upon the fortress of Cashel and a line of painted wagons carries entertainers to mark the occasion. But preparations take a deathly turn when one of the carriages is set alight and two corpses are found lying poisoned within. As Sister Fidelma and her companion Eadulf investigate they are quickly plunged into the menacing marshlands of Osraige - where the bloody origin of the Abbey of Cainnech is wreaking his revenge. What is the symbolism of the Golden Stone and who are the mysterious members of the Fellowship of the Raven? Fidelma and Eadulf must face mortal danger before they can untangle the evil that strikes at the very heart of the kingdom.

Part of the The Sister Fidelma Mystery Series series.