Despite the wintry weather, Roger the traveling Chapman is once again relishing the freedom of his calling. As he journeys west, he finds himself following in the footsteps of an itinerant preacher, Brother Simeon, whose fiery sermons are the talk of the countryside. Roger, who has met the Dominican friar before, and finds his zeal wearying, is less than enthused when they meet at Cederwell Manor, where Simeon has come to pray with Lady Cederwell and Roger to sell her his wares.

But scarcely have the two men arrived when Lady Cederwell is found dead, sprawled on the frozen earth beneath the ancient tower she had converted into her private chapel, the circumstances strangely fulfilling the prophecy of a babbling hermit Roger had met on the road. Suddenly the friar and the Chapman are united by their aim - to discover the truth behind the death at Cederwell Manor.