Grace Marks has been convicted of her involvement in the vicious murders of her employer, the wealthy Thomas Kinnear, and his housekeeper, Nancy Montgomery. Years later, Dr. Simon Jordan–an up-and-coming expert in the burgeoning field of mental illness–listens to Grace's story, from her family's difficult passage from Ireland to Canada, to her time as a maid in Thomas Kinnear's household. As Grace relives her past, Jordan draws her closer to a dark maze of relationships and her lost memories of the day her life was shattered.