New York : Signet, 1994
The story takes place in medieval England in the seventh-century. King Oswy of Northunbria has called an assembly of representatives from Ireland, Britain and Rome to determine which Church doctrine the Kingdom of Northumbria will follow. There is a divide between the Irish faction and the Roman faction. But all this takes a new direction when one of the main speakers is murdered. Sister Fidelma, an advocate of the courts of Ireland, is called upon to solve the murder. Did the murder have anything to do with the assembly? Or were there other motives involved? This is the first of a series about Sister Fidelma.