A priest and his housekeeper abandon a baby girl on the doorstep of a house near the Black Church in Dublin's north inner city in February 1923. Three local women notice the couple's suspicious behaviour and apprehend them. The two are handed over to the police, charged and sent for trial. A month later, a young doctor is shot dead on the streets of Mohill, Co. Leitrim. The two incidents are connected, but how? In the days following the...