A skilled young female agent is tasked with capturing a rogue former agent before she can unleash a biological weapon starting with the wealthy and powerful purveyors of the international sex trade.
The Duke of Frome John Langton with his wife, their baby born after complications 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 cot. 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 McCarthy under pressure from the diocese to provide a Christmas service fit for a Duke receives unexpected help from a vagrant she finds in the confessional.
Set in the 1950s in the fictional village of Kembleford, the series follows Roman Catholic priest Father Brown who has a knack for solving crimes. He is assisted by parish secretary Bridgette McCarthy and is often a source of frustration for the local police.
When best selling author Carl Black moves his family back to his childhood home, he must team up with oddball neighbors to do battle with a pimp, who may or may not be an actual vampire.