London, the year 1815, in a dark January night the sharp and intelligent Catherina Wilson, a young apprentice doctor who worked with her father in Whitechapel slums, loses her father in a tragic fight onboard Captain Saul’s ship. The only parent, family and life she had are suddenly lost. The same night, on the ship young heiress Lady Sarah Lieven McCartney was poisoned and was lying on her death bed. From on a journey from America Lady Sarah has recently been requested to come claim her grandfather’s inheritance in London, a city she left when she was 8 years old. Lady Sarah and Catherina paths cross this dark cold night, both finding condolence and a kindred soul in each other. Catherina Wilson leaves the ship that night having lost a parent but gained a new name and title; as Lady Sarah Lieven McCartney, with a promise to keep. The new Lady Sarah Lieven McCartney finds herself thrown into a swirling dazzling world of mystery, romance and intrigues two powerful men, Arthur Wessely, the Duke of Wellington and the Prince of Wales, Regent George VI. Searching for pieces to a puzzle in a complicated and mean spirited Lieven family, will Catherina fulfill the promise or will she lose herself in the worlds of Dukes and Regents, leaving behind her profession and commitment to the slums of Whitechapel. Will she lose her identity while playing another?