The All of It is an exquisitely told story of sin and understanding. As a frustrated Father Declan de Loughry fishes for salmon in inclement Irish weather, he mulls over the events of the previous days. Four days ago, while performing the last rites on a dying husband, he learned that the couple was never married and, in fact, are brother and sister. In a breathless retelling, Enda, the sister, recounts their terribly abusive childhood at the hands of their drunken, widowed father. As Enda relates the gripping events surrounding her and her brother's act of incest, Father Declan finds himself mesmerized by both the tale and the teller. While Father Declan struggles with an unyielding river, he must negotiate between his priestly condemnation of incest and his own heart's desires toward Enda.