The Duke of Frome John Langton with his wife, their baby born after plications during childbirth, a domineering nanny, nursery maid and valet arrive at Montague Hall for Lady Felicia's Yuletide ball. During the evening the baby is taken from his t. Inspector Mallory suspects an inside job by the valet when his secret wife arrives while Brown is more interested in the birth of the baby at a home for unmarried mothers. Mrs McChy under pressure from the diocese to vide a Christmas service fit for a Duke receives unexpected help from a vagrant she finds in the nfessional.