Lady Mary is a ward of Lord and Lady Macbeth. Her life was forever changed when her father, Lord Cawdor, betrayed the Scottish king — and was hanged as a traitor. In an instant, Mary lost both her father and future. Now she's trapped in a castle with a power-hungry couple who will do anything to get what they want — and are willing to crush anyone in their way — including Mary. As the murderous events of Shakespeare's play unfold around her, Mary must struggle to survive — and do what she can to prevent more deaths. But can a lone girl save lives when a legion of Scottish lords cannot?