In the tumultuous summer of 1138, King Stephen lays siege to Shrewsbury Castle, held by rebels loyal to Empress Matilda. Amidst the chaos, Brother Cadfael, the abbey's herbalist, discovers that "Godric," a young helper sent to the abbey, is actually Godith Adeney, daughter of a rebel leader. As political tensions rise, alliances are tested, secrets are unveiled, and love blossoms in unexpected quarters. The narrative culminates in a dramatic confrontation that reshapes the lives of all involved, leading to the joyous union of the Sheriff of Shrewsbury and his beloved.