Miss Sarah Tolerance may be a Fallen Woman, but she refuses to take the path decreed for her by English Society in the year 1810. Instead, she becomes an Agent of Inquiry, hired by those of means in the court of Queen Regent Charlotte.

Expecting to specialize in finding lost trinkets and wastrel husbands, her skills with pistol and sword - and her sharp wit - lead her to more complicated cases.

Her newest case is one such puzzle: who killed the Chevalier d'Aubigny? The French émigré was beaten to death in his own bedchamber, windows and doors sealed tight.

But the Chevalier had more enemies than he had friends, and even his friends had cause to wish him dead. Miss Tolerance's search takes her from the lowest brothels of the seedy London underworld, where men go to indulge their more aggressive desires, to secrets hidden within the Royal Family...

Welcome to Miss Tolerance's Regency London.