Seraphina is a ghost of the East End. Clad in black silk and armed with silver lockpicks, she infiltrates the opulent ballrooms of Mayfair as the "e;Widow Sterling."e; Her target is the Duke of Moreland, a man whose wealth is built on a foundation of blood and broken lives. But guarding the Duke's secrets is Lord Julian Ashcroft, a man known as the "e;Black Dog"e; for his cold efficiency and iron loyalty.What begins as a lethal game of cat-and-mouse evolves into a desperate alliance when a common enemy emerges from the shadows. From the heights of aristocratic galas to the bowels of a sinking steamship on the Thames, Seraphina and Julian must navigate a web of betrayal and hidden birthrights. As the masks fall away, Seraphina must decide if she is seeking justice for her mother or a crown for herself, while Julian must choose between the law he serves and the woman who has stolen his heart.