London, 1749: Following the murder of her husband, Jonas, in a violent street robbery, Hannah Cole is struggling to turn a profit at her confectionary shop on Piccadilly as her suppliers conspire to put her out of business. So when she learns that Jonas had a large sum of money in his bank account, the surprise is, at first, extremely welcome. But her financial windfall attracts the attention of author-turned-magistrate Henry Fielding, who believes the money might have been acquired through ill-gotten means and seeks to confiscate it. Endeavoring to prove otherwise, Hannah enlists the help of William Devereux, a friend of her late husband. As they delve into the mysteries of her Jonas' double life in Georgian London’s gambling dens, Hannah unravels secrets even more devastating than his murder.

Cornwall, 1730: A young girl known only as Red travels with her father making a living predicting fortunes using the ancient Cornish method of the Square of Sevens. Shortly before he dies, her father entrusts Red’s care to a gentleman scholar, along with a document containing the secret of the Square of Sevens technique. Raised as a lady amidst the Georgian splendor of Bath, Red’s fortune-telling delights in high society. But she cannot ignore the questions that gnaw at her soul: Who was her mother? How did she die? And who are the mysterious enemies her father was always terrified would find him? While Red’s pursuit of these mysteries brings her the possibility of great reward, it also leads to grave danger.