'It would not be fair to record the adventures of Father Brown, without admitting that he was once involved in a grave scandal. There still are persons, perhaps even of his own community, who would say that there was a sort of blot upon his name. It happened in a picturesque Mexican road-house of rather loose repute . . . ' After many years in the priesthood, Father Brown knows human nature and is not afraid of its dark side. In this fifth and final series of mysteries, the clerical mastermind confronts slander, passion, superstition, high crimes and misdemeanours, outwitting some quite extraordinary and villainous adversaries on the way.