The trilogy of books about the Merciful Nun tell the stories of three nuns of different generations who fall from grace and are used by the church to service the needs of bodily desires. In this first book Molly is a clever child from a very poor family in the latter part of the 19th century who is accepted into the Convent but is then seduced by a worldly Novice. She is sent to the College of Correction and Redemption where she finds herself whoring for randy clerics who have all manner of sexual needs. After eighteen months of this she is returned to her convent, pregnant. Subsequently she uses the knowledge she gained during her time as a sexual toy to gain preferment and in the last chapters we see her, in her turn, as Mother Superior sending an errant young nun to the College.