It is 1843, and Grace Marks has been convicted for her involvement in the vicious murders of her employer Thomas Kinnear and Nancy Montgomery, his housekeeper and mistress. Some believe Grace is innocent; others think her evil or insane. Now serving a life sentence, Grace claims to have no memory of the murders. Dr. Simon Jordan, an up-and-coming expert in the burgeoning field of mental illness, is engaged by a group of reformers and spiritualists...