It is 1628, and Alexander Seaton's happily settled life as a university teacher in Aberdeen is shattered by the arrival in town of a stranger carrying a plea for help from his dead mother's family in Ireland. The family has been placed under a poet's curse, elements of which have begun to come true. Reluctantly answering the call, Alexander travels to Ulster, to find himself among a family riven by secrets and long-standing resentments. In the course of seeking out the author of the curse, he becomes increasingly entangled with both sides in the conflict - fugitive priests, displaced poets, rebellious plotters and agents of the king...