Grace Marks is an Irish maid, convicted and imprisoned at the age of 16 for the 1843 murder of her employer, Thomas Kinnear, and his housekeeper, Nancy Montgomery. Her trial is highly politicized, with Reformers believing she should be acquitted, and Tories believing her to be guilty. Many established men become infatuated with Grace, and put considerable time and effort into securing her pardon. Grace is a mystery – a woman who can seem at once manipulative and the innocent victim of circumstance.