AD 672. The hamlet of Cloichín is said to be a veritable Eden, with its prosperous farms and close-knit, friendly community. But when Sister Fidelma and Eadulf arrive, a new priest has ordered the villagers to lynch a man accused of murdering a local farmer, his wife and two sons.

The only evidence they hold against him is the fact that he is a stranger to their land. Saving the man's life, Fidelma is determined that the villagers must give the newcomer a fair trial. But there is to be more blood in Eden and more lives will be lost as long-standing friends become new-found enemies, and no one knows who to trust .