Mademoiselle Stangerson retires to bed in the Yellow Room. Suddenly revolver shots echo through the house and she screams for help. Her father and a servant run to the locked room where they find the wounded girl - alone. The only other exit, a window - barred. How had the assailant escaped?
Grace and Mercy are very different women, but are both caught up in the war between Germany and France. When Grace is hit by a loose shell, Mercy seizes the chance to escape her past as a fallen woman and convict by assuming Grace's identity and travelling to England.