London, 1865. From the moment Hollis Darby meets Ana Newport, he's smitten. But Hollis has a secret: the deep coffers that have kept his family afloat for generations are bare, so he supports himself by writing penny dreadfuls. Ana also has a secret. She teaches music during the day, and at night she breaks into the homes of the wealthy to reclaim trinkets and treasures she feels were unjustly stolen from her family when they were struggling. When a spree of robberies rocks the city, Ana and Hollis join forces to solve the crimes, discovering that working together deepens the affection between them. After all, who better to save the day than a gentleman and a thief?