In the Spring of 1277, Prioress Eleanor goes on a pilgrimage to a famous East Anglian shrine. There are rumors that King Edward may also visit the shrine soon to seek God's blessing for his invasion of Wales. Lurking in this sacred place, however, is an assassin hoping to murder a king. Soon after Prioress Eleanor and Brother Thomas arrive, a nun falls to her death from the priory bell tower. Brother Thomas finds the body, and the pair quickly grasp...