A Father's life story as a Catholic missionary in Guyana, his rise through the Vatican, his love for a young woman and his departure from the Church. When a call comes in from Canada, the teacher knows something is wrong. A foreboding text from her brother confirms the news and she leaves her home in Virginia and races up to Canada. She finds her father in a hospital with a fatal diagnosis and knows his time is limited. She begs him to tell her the full story of his life as a Catholic priest – the story that he has hidden from his family for decades.

For the next few years, the Father and Daughter collaborate in telling the intricate story. The narrative begins in Ireland with a fatal steeplechase accident where the grandfather is trampled to death. It traces the father's life as an Irish Catholic boy and his journey to the Scarboro Missions. It documents his service in the jungles of Guyana and his rise through the bureaucracy of the Vatican in Rome. When he falls in love with a young woman, he decides to leave the Church and spends the rest of his life trying to raise a family.

The Quality of Mercy reveals the inner workings of the Catholic Church and explores the struggle of a family consumed by secrets, guilt and then, death.